Gtak4 user manual
Table of Contents
1 Introduction..................................................1
2 Requirements...............................................2
3 Getting started..............................................2
3.1 Download..............................................2
3.2 Locate the Kontakt4 Library.................2
3.3 Install....................................................3
3.4 Guitar to MIDI converter setup............3
3.5 Start Kontakt4.......................................4
4 Gtak4 Basics.................................................5
4.1 The Gtak4 panel....................................5
4.2 String enable.........................................6
4.3 Fret filter...............................................6
4.4 Pick filter...............................................6
4.5 Pitchbend quantization.........................7
4.6 CC blocking...........................................7
5 Gtak4 Pedal control......................................7
5.1 Pedal Mutes...........................................8
5.2 Pedal Holds...........................................8
5.3 Pedal Sustains.......................................8
5.4 Pedal Sus/Hold.....................................8
5.5 Mute on CCs..........................................9
5.6 Pedalboard example.............................9
6 Gtak4 in the Kontakt4 Library.....................9
6.1 Drum kits.............................................10
6.2 Master FX............................................10
6.3 Key switched instruments...................11
6.4 Dynamic Keyswitching........................12
6.5 VSL legato instruments.......................12
6.6 Monophonic instruments....................12
6.7 Harmonized Instruments....................13
6.8 Arpeggiator Instruments.....................13
6.9 Micro Tuned Instruments...................13
6.10 Getting the most from Kontakt.........14
7 The Config panel.........................................14
7.1 CC blocking..........................................14
7.2 Transposition.......................................15
7.3 Open string settings.............................15
7.4 Base channel........................................16
7.5 Strings..................................................16
7.6 Pitchbend range...................................16
7.7 Pick Control settings............................16
7.8 New note velocity................................16
7.9 Sustain 1 note/string...........................16
7.10 Allow other MIDI channels...............16
8 Pedal Control using notes...........................16
9 Using Gtak4 with other instruments..........17
10 Setting up Kontakt4..................................18
10.1 Setting the default multi....................18
10.2 Setting MIDI Omni...........................18
10.3 Configuring Quick-load menus.........18
10.4 Setting up the database.....................19
11 Custom Gtak4 downloads.........................20
12 Troubleshooting........................................20
Gtak4 user manual
1 Introduction
Gtak4 makes it easy to use Kontakt4 with a
Guitar to MIDI converter. It comes preloaded
into copies of over 1000 instruments from the
Kontakt4 library, so you can load these
instruments and play them instantly without
having to make any settings.
Gtak4 makes Kontakt4 instruments
understand all the pitchbend information that
Guitar to MIDI converters send, so there is no
need to use one instrument for each string.
Gtak4 also lets you control how each
instrument responds to your playing – for
instance, which strings and frets play each
instrument. Gtak4 provides a comprehensive
pedal control section and smart controller
The supplied Kontakt4 library instruments
have also been extensively tweaked to make
them work better with Guitar to MIDI
Note: we do not supply the samples from the
Kontakt4 library, just tweaked instrument
files. You must have the Kontakt4 library
installed to use these instrument files.
This manual describes how to install and
operate Gtak4, and also how to use the Gtak4
instruments in the Kontakt4 library. You can
probably figure out a lot about how to use
Gtak4 just by playing around with it. However,
as the library is so big, it is probably a good
idea to read through all of the section on the
library (Section 6), or you might miss
something interesting.
17:35 - 15/11/09
2 Requirements
3 Getting started
Before starting you must have already
installed Kontakt4 and its Instrument Library.
See the Kontakt4 documentation for details of
how to do this. Make sure you have installed
any updates to Kontakt4 and the Library
available from Native Instruments.
To get Gtak4 working on your computer you
will need to:
1) Download Gtak4
2) Find your Kontakt4 Library folder
3) Install Gtak4 into your Kontakt4 Library
You should also be able to run Kontakt4, get
MIDI into it from your Guitar to MIDI
converter and get sound out of Kontakt4 to
your soundcard.
4) Set up your Guitar to MIDI converter
The following sections explain how to do this.
You do not need to know much else about
Kontakt4 to be able to use Gtak4. However,
you should understand some basic Kontakt4
terms such as:
3.1 Download
To download Gtak4:
1) Go to
2) If you are not already logged in, type your
user name and password into the boxes and
click Log in.
3) You should now see a list of your products,
including Gtak4.
These are all explained in the first few pages of
the Kontakt4 manual.
4) Click the Download link for Gtak4. The
download is supplied as a zip file.
5) In Windows XP (Internet Explorer): you
will then see a box asking what to do with
the file, choose Save (do not choose Open).
A new box will appear asking where to save
the file, choose any convenient folder.
In OSX (Safari) the file should be
automatically downloaded and be unzipped
in you downloads folder.
Advanced users can download customised
versions of Gtak4, see section 11 for details.
3.2 Locate the Kontakt4 Library
The Gtak4 files must be installed in the
Kontakt4 library folder, so that the sample
paths in the Gtak4 instruments work.
To find your Kontakt4 library folder:
1) Open Kontakt4, either Standalone or in a
2) Click the Gear Icon to open the Options
3) Click the Load / Import Tab
4) The library path is shown near the bottom.
Note that it does not matter exactly how you
unzip the files as long as you get the Gtak4
directory contained in the zip file into your
Kontakt4 directory as shown above.
3.4 Guitar to MIDI converter setup
Note: The library path might be incorrect or
not set at all. In this case you should
manually locate the library and enter the
path in the Options Dialog yourself.
Certain parameters in your Guitar to MIDI
converter need to be set to match those in
Gtak4 so that the two can communicate
correctly. These values are configurable in
Gtak4, but in this section we will assume that
you use the default values.
3.3 Install
The Gtak4 folder needs to be placed in the
Kontakt4 library folder which you located in
the previous step.
Gtak4 handles things such as pitchbend
quantization and stores the settings with each
Kontakt4 instrument, so once you have set up
your Guitar to MIDI converter you should not
have to change the settings again.
In OSX (Safari) the zip file you downloaded
should have been automatically unzipped and
the resulting Gtak4 folder placed in your
downloads folder. Navigate to your downloads
folder and then move the Gtak4 folder into
your Kontakt4 library folder.
The settings you should make are:
1) Strings send on separate MIDI channels 1
to 6.
In Windows XP / Vista:
2) Pitchbend range: +/- 12 Semitones.
1) Navigate to the folder where you saved the
downloaded zip file (which should be called
something like
3) Pitchbend unquantized so it changes
smoothly, not in semitone steps (so, on
Roland models do not set Chromatic
2) Right click on the zip file and select Extract
4) On/Off Pedals send MIDI Continuous
Controllers (CC's) and should send 0 when
up and 127 when pressed down. Gtak4's
default pedal is CC 64. More complicated
setups with multiple pedals are discussed in
section 5.6.
3) The Extraction Wizard should appear. Click
4) It should then ask you to select a
destination to extract to. Click Browse,
navigate to your Kontakt4 Library folder
and click OK. The destination should be
something like F:\Kontakt 4 Library.
5) If you want to control Volume using an
expression pedal or the wheel controller on
your Guitar to MIDI pickup, set this to send
CC 7.
5) Click Next then Finish
The following subsections give example
settings for a couple of specific converters.
After installing Gtak4, your Kontakt4 library
folder should look something like this:
3.4.1 Axon AX100MkII
3.5 Start Kontakt4
The settings can either be made using the
Computer Editor, or the front panel buttons.
Assuming you are using the front panel
buttons, in GLOBAL mode, set parameters:
Kontakt4 can be run either standalone or as a
plugin in a sequencer. Gtak4 does not need
any special settings when Kontakt4 is running
standalone. Just set the MIDI and audio
settings so that your Guitar to MIDI converter
is routed to Kontakt4 and Kontakt4 is routed
to your soundcard outputs.
If you are running Kontakt4 in a sequencer,
you must make sure that all the MIDI
channels are sent to Kontakt4.
3) (optional) SND PBENDRANGE = OFF
Then select an unused preset (which will be
the preset you use all the time with Gtak4) and
in PRESET mode press EDIT, set parameters:
For instance, in Cubase4 you must load
Kontakt4 in the VST Instrument Rack (not an
Instrument Track) and create a MIDI track
that is routed to Kontakt4. This MIDI track's
MIDI channel must be set to Any as shown
1) STRING MODE = SEP (Separate)
2) HOLD MODE = CNTRL (Controller)
5) QUANTIZE = OFF (Pitchbend quantize off)
6) If you want to use Pick Control:
b) PICK VAL1 = 0
c) PICK VAL2 = 127
For the latest information on setting up
Kontakt in different sequencers visit the Gtak
forum at .
QUANTIZE and PICK CONTRL are parameters of
the split zone, so to reach these you have to
select the split (you should only have one
split in this preset). See the Axon manual for
more details.
Next, load the Gtak4 multi:
1) Click the disk icon in Kontakt4 to open the
file menu. Click load....
Name the preset something like “Gtak4” and
save it. Do not set up any string or pick splits,
these are handled by Gtak4.
3.4.2 Roland GI-20
Make the following settings on the Roland GI20:
2) Navigate to the Gtak4 folder (in your
Kontakt4 library folder) and select
gtak4_multi.nkm . Click Open.
1) Transmission Mode to Mono.
3) Click Yes to replace the current multi.
3) BEND RANGE = 12
4) (optional) Foot switch 1 sends CC64.
5) (optional) GK Volume sends CC7.
6) Make sure the Expression pedals are not set
to send pitchbend.
See the GI-20 manual for details of how to
make these settings.
If the instrument does not play properly see
Section 12.
One final optional step: Gtak4 has built-in
help. When you hover over a control with your
mouse help appears in the info pane. To show
the info pane click the “i” icon as shown below:
Note: Gtak4 instruments only work in a
Gtak4 multi (as this contains the necessary
Gtak multiscript).
To make the Gtak4 multi the default see
Section 10.1 .
4 Gtak4 Basics
Now load a Gtak4 instrument:
1) Click the disk icon in Kontakt4 to open the
file menu. Click load....
We have set sensible defaults for all the
instruments in the Kontakt4 Library, so often
you will not need to make any changes. If, for
example, you want to play different
instruments on different strings or use pedal
control you have to make settings on the
Gtak4 Panel.
2) Navigate to one of the folders under the
Gtak4 folder (e.g. Gtak4\Band\1 – Horns)
3) Select an instrument (e.g.
Sax Section.nki) and click open.
If you want to do more advanced things such
as configure a guitar in a non-standard tuning,
transpose strings, or change various other
settings you will use the Config Panel which is
described in Section 6.10.
There are many other ways of loading
instruments. The fastest is the Quick-load
menu. To make Gtak4 instruments appear in
this menu see Section 10.3 .
4) Click the down arrow by Midi ch: and
select omni.
4.1 The Gtak4 panel
Gtak4 is a KSP script with a Performance
View, this means that its controls appear in the
instrument header (unless the instrument is
minimized). Each Kontakt4 instrument can
contain up to 5 KSP scripts. If more than one
script has a Performance View then tabs will
appear at the bottom of the instrument to
allow you to select which script's panel to
show. In this case, to switch from another
panel to Gtak4's panel click on the Gtak4 tab
as shown below.
To make Omni mode the default for loaded
instruments see Section 10.2 .
5) Play!
For example:
We have modified many of the other KSP
scripts in the Kontakt4 Library to make
everything work properly. These scripts
have been renamed Original_name (Gtak4).
If LowFret = 0 and HiFret = 7 the
instrument will play when you play notes
anywhere from open strings up to the 7th
If LowFret = 1 and HiFret = 1 the
instrument will only play when you play
on the first fret, so you will only be able to
play F,C,G#,D# and A#!
If your guitar is in a non-standard tuning
(or you are using a bass) and you want to
use the fret filter, you must set the open
string notes in the Config panel. See Section
4.2 String enable
4.4 Pick filter
The Pick filter is an Axon-only feature that lets
you set a range of picking positions that the
instrument responds to. For this to work you
have to set the Axon to send the picking
position as a CC and configure Gtak4 to
respond to this CC. If the pick filter is
currently hidden see Section 7.7 for details of
how to enable it.
You can select which strings the instrument
responds to using the string enable buttons at
the top of the panel.
In the example shown above, the instrument
will play when you play on strings 1, 2, 3 and 4
(the high E, B, G and D strings), but will
ignore any notes on strings 5 and 6 (the A and
low E strings).
As each instrument has its own set of string
enable buttons you can assign instruments to
strings in any way you like.
Turn on the Pick filter by clicking the Pick
Filter button. Then use the LowPick and
HiPick knobs to set the range the instrument
should respond to. The bridge position is 0
and the start of the neck is 127.
4.3 Fret filter
The Fret filter lets you set a fret range that the
instrument responds to. When the fret filter is
off, the instrument will respond to notes
played anywhere on the neck. Turn on the fret
filter by clicking on the Fret filter button.
Set the range of frets you want the instrument
to respond to using the LowFret and HiFret
So, for example, if LowPick=0 and HiPick=64
the instrument will play when you pick
anywhere between the bridge and a point
about half way towards the neck. Then you can
set up another instrument to play in the other
positions by setting LowPick=65 and
4.5 Pitchbend quantization
4.6 CC blocking
Guitar to MIDI converters send pitchbend
when you play bends, slides, hammer ons and
pull offs. Different instruments require
different handling of pitchbend. For instance,
a piano does not sound natural if you can bend
the strings!
By default Gtak4 is set to CCblock:Smart
mode. This means that it will block CCs when
a different instrument is playing. So, for
instance, CC7 (volume) will only control the
volume of the instrument that is currently
playing. See Section 7.1 for more details of this
and the other CC blocking modes.
Pitchbend quantization is the process of
turning the gradual pitch changes from the
Guitar to MIDI converters into semitone
steps. Some Guitar to MIDI converters refer to
this as Chromatic Mode. Although most Guitar
to MIDI converters can do pitchbend
quantization, it is better to do it in Gtak4
because then each instrument can have its
own setting and the setting is stored with the
5 Gtak4 Pedal control
Pedal control is one of the most useful features
of Gtak4. The Kontakt4 rack can hold up to 64
instruments, and using pedal control you can
switch between them on the fly.
If you have one MIDI pedal you can switch
between two instruments, or have one
instrument hold while you solo over the top.
Two pedals opens up more possibilities. With
a 10 pedal MIDI pedal board things really start
to get interesting!
Gtak4 has three PBQuant modes:
1) Off: No pitchbend quantization
2) On: Pitchbend is quantized to semitone
You can also control all these pedal functions
by playing notes on a particular string using
the Gtak notes to CC multiscript (see Section
The pedal settings are below the fret filter:
3) Auto: Pitchbend quantization is off when
single notes are played (so you can use
vibrato and bends), but is turned on when
more than one note is played (so chords
sound perfectly in tune)
From left to right the controls are:
Next to the PBQuant is the Pitchbend trigger
menu, When this is set to PB->New a new note
is triggered when the pitchbend is sufficient.
So, hammer ons, pulloffs and slides will
trigger new notes (bends too, but this feels
pretty strange!). This mode is the default for
pianos as it sounds most natural.
Pedal mode: Off, Hold, Sustain, Hold/Sus,
Mute or Learn.
 when up / when down: sets which way round
the pedal works. In the example above the
instrument will mute when the pedal is up.
 Pedal CC: the CC number that this
instrument will respond to.
You can turn on PB->New note in any of the
PBQuant modes.
 >>Pedal<< : this shows the current
state of
this instrument's pedal. You can also click it
to simulate pressing the pedal for testing.
The final Pitchbend trigger value is PB->Str6
New which only triggers new notes on String
6. This is used to improve the reliability of
instruments that use String 6 for
When choosing a Pedal CC you should avoid
103 (which Gtak4 uses) and 65, 66, 126 and
127 (which Kontakt4 instruments use).
The second row of controls lets you mute
whenever any of a range of pedals is down and
The relative velocity of the new note is set in
the Config panel, see section 7.8.
5.2 Pedal Holds
is described in Section 5.5.
Pedal Holds mode is used when you want an
instrument to keep playing while you play
another instrument.
If you select Pedal Holds... when up then the
instrument will not play until you press the
pedal down. Once the pedal is down the
instrument will play as normal. When you
release the pedal any playing notes will be
held, in other words they will continue to
sound. However, no new notes will sound.
The pedal can perform different functions,
choose one by clicking the Pedal: button.
When set to Off the pedal does nothing in
Gtak4. When set to Learn CC Gtak will set its
PedalCC to the number of the next CC that it sees
and then revert to the previous pedal mode.
In Pedal Holds... when up mode any held
notes that are playing at the time the pedal is
pressed down are stopped instantly. So,
quickly pressing and releasing the pedal
without playing any new notes will stop the
instrument sounding.
The following sections describe the rest of the
pedal modes.
When the Pedal Mode is “Off”, Gtak4 passes
the pedal CC to the Kontakt4 Instrument, for
instance in pianos CC64 controls the damper
If you use Pedal Holds... when up for a
backing instrument (a pad for example) then
normally you would set Pedal Mutes... when
down for the lead instrument, so that it does
not play while you are playing the backing
5.1 Pedal Mutes
If you have more than one backing
instrument, you should use Mute on CCs for
the lead instrument(s), see Section 5.5.
Pedal Mutes is the simplest pedal mode.
When Pedal Mutes... when up is set and the
pedal is up, the instrument will not play new
notes. Existing notes are not cut off when you
lift the pedal, but continue until the string that
played them stops sounding.
Use Pedal Holds... when down if you want
things to work the other way round. In this
mode you can play the backing instrument
normally, and then step on the pedal to hold
the backing instrument while you play another
You can use Pedal mutes to switch between
two instruments by setting one to mute when
up and the other to mute when down as shown
5.3 Pedal Sustains
Pedal Sustains... when down works in a
similar way to a piano's sustain pedal. When
the pedal is up the instrument plays normally.
When the pedal is down, notes sustain. In
other words, the instrument notes keep
playing even once the guitar's string has
stopped sounding. Releasing the pedal stops
any notes that are sustaining.
You can choose between sustaining just one
note per string (the default) or all played notes
in the Config panel. See Section 7.9 for more
Pedal Sustains... when up is useful when
you want an instrument to sustain most, or all,
of the time.
5.4 Pedal Sus/Hold
5.6 Pedalboard example
Pedal:Sus/Hold is a combination of the
For the purposes of this example let's assume
we have a 10 pedal pedalboard that sends on
CC's 51 to 60.
sustain and hold modes. When this mode is
selected the when up/down button toggles
between Up:Sus/Down:Hold and the opposite:
Assume we have 5 lead instruments and 5
backing instruments (a pad, two arpeggiators
and two drum machines).
With Up:Hold/Down:Sus notes are held when
the pedal is up and sustained when the pedal
is down. This is useful, for instance, when you
want to use an instrument that has an
arpeggiator as a backing instrument. When
the pedal is down the arpeggio keeps playing
even if the note stops sounding, then when
you release the pedal the last arpeggio keeps
playing while you play other instruments.
The first step is to set up the pedal board. For
the lead instruments we set the pedals to be
latching (press to turn off and press again to
turn off). This will let us play any or all of
them at once.
To stop notes playing press and release the
pedal quickly without playing any new notes.
For the backing instruments we set the pedals
to be momentary (only on while pressed
down). This will let us press the pedal down,
play something to be held and then release the
5.5 Mute on CCs
Then we could make the following settings in
Gtak4 for each instrument:
Mute on CCs mutes the instrument whenever
Pedal Mode
any pedal in the range of CCs specified is
To turn it on and off click the Mute on CCs
button. Set the range of CCs using the From CC
and To CC controls. The field to the right of To
CC displays information about what is muting
the instrument so you can keep track of what
is happening. When Mute on CCs is on, the
instrument will mute when any pedal in the
range is down – except the instrument's own
Pedal CC. So, in the example above any CC
from 55 to 64 (inclusive) would mute the
Hold when up
Arp 1
Arp 2
Drum 1
Mute when up
Drum 2
Mute when up
Lead 1
Mute when up
Lead 2
Mute when up
Lead 3
Mute when up
Lead 4
Mute when up
Lead 5
Mute when up
Then save the multi so we don't loose all that
6 Gtak4 in the Kontakt4
Mute on CCs is very useful in lead instruments
We have tweaked the Kontakt4 Library in
many ways to make it easy to use with Guitar
to MIDI converters. Most obviously, we have
added the Gtak4 script to each instrument so
you do not have to load it yourself.
when you have several backing instruments
held by different pedals (using Pedal
holds... when up). By setting the range to
cover all the backing instruments' pedals you
can ensure that the lead instrument does not
play while you are playing any of backing
We have also made more subtle changes:
The transpose setting in Gtak4 has been set
so that the guitar can play the most notes
possible. For instance it is set to -24 (a shift
down of two octaves) for the Tuba. This
means a guitar can play the Tuba's lowest
See Native Instruments' Library Script Manual
for more details on using the Drum Computer.
Basically there are 12 tracks and 12 patterns.
You can choose the note each track plays and
program your own patterns.
Pitchbend quantization has been set to a
sensible value for each instrument. For
instance, for pianos and organs pitchbend is
set to quantized and new notes are
triggered, whereas for most stringed
instruments pitchbend quantization is set to
We have configured Gtak4 in these
instruments so that the 12 patterns of the
sequencer map to notes on the low E string
(using the transpose settings in the Gtak4
Config Panel). We have also modified the
script so that playing the open string stops
playback. Playing a note on frets 1 to 12 starts
patterns 1 to 12 playing (playing the same note
again is another way to stop playback). Playing
anywhere else plays single drum hits.
We have extended the range of most
instruments to match the guitar. For
instance, the violins originally only played
down to G, by changing the range the lowest
sample we have made them play down to E.
This is slightly less realistic, but much more
Note that the patterns continue to play after
the note has finished because we have set the
“Latch” button on the Groovebox tab. If you
want the pattern to stop as soon as the note
finishes you can turn the “Latch” button off.
We have not extended instruments in the
Choir collection because they sound very
unnatural when extended. So, the “Bass”,
“Tenor”, “Alto” or “Soprano” instruments will
only play over a limited range. The
combined instruments (with “Choir” in their
names) contain all the other samples and so
play over a much wider range.
When running Kontakt4 standalone you can
set the tempo of the played patterns by
clicking on the Metronome/Tuning fork icon.
When running as a plugin the tempo is set by
the sequencer.
We have also had to alter many of the scripts
in the Kontakt4 library to work with Gtak4
(mostly because of strange behaviour in the
KSP scripting system). This should not effect
you unless you want to load Gtak4 into your
own instruments derived from the library
instruments, see Section 9 for more details.
You will find instruments with Drum Computer
or Groovebox in the following sections:
 Urban Beats/
 Vintage/Drum Machines/
 Band/7 - Drum Kits/
6.1 Drum kits
 Synth/6 - Synth Drums/
The Kontakt4 library's drum kits and Urban
Beats instruments contain a pattern based
sequencer called either Drum Computer or
Groovebox (they are both the same thing).
The Urban Beats instruments also have a tab
that plays loop presets. We have not mapped
these presets to any particular position but
you can play them using the notes from C3
Our version of the Loops script has only 11
presets because we use the 12th note to stop
the Groovebox playing.
6.2 Master FX
Instruments in the Urban Beats collection also
have a Master FX section which lets you set 12
presets for the Instrument's master effects.
This gives you instant access to a range of
effects such as delays, filter and saturation.
To see the control panel for them click the
Drum Computer or Groovebox tab.
Instrument tab also lets you unload any
articulations you are not using to save memory
(in the example above Tremolo and Pizzicato
have been unloaded).
We have also provided copies of all of these
instruments with Gtak4 so that notes on the
low E string are transposed to these notes.
These instruments can be found in:
 Orchestral/1 - VSL Strings EkeySwitch
 Orchestral/2 - VSL Woodwinds EkeySwitch
 Orchestral/3 - VSL Brass EKeySwitch
We have configured Gtak4 in these
instruments so that the 12 presets map to
notes on the A string (using the transpose
settings in the Gtak4 Config Panel). Playing
the open string sets the default preset. Playing
a note on frets 1 to 12 selects preset 1 to 12.
The instruments in Choir/Vowel Keyswitches
have also been set up the same way.
This is done using the Transpose function in
the Gtak4 Config panel as shown below.
6.3 Key switched instruments
Some of the instruments in the Orchestra
section can change articulations (such as
staccato or pizzicato) using key switching. This
means that when you play a particular note
the instrument switches to a different
articulation and all the following notes are
played with that articulation. See the Overview
section of the Kontakt4 Library Manual for
more information on Keyswitching.
In the Gtak4 versions of these instruments the
keyswitches all start at the same note (D-2) as
shown below (the keyswitch notes are marked
in red on the keyboard).
The following table shows which notes to play
to switch to which articulation. .
Low E
Brass /
Fret 1
Fret 2
Fret 3
Fret 4
Fret 5
Sustain 2
Fret 6
Sustain 3
The VSL Legacy folder contains instruments
from Kontakt3. Except for the Legato
instruments, there is no real reason to use
these any more. However, if you do want to
use them you will find that the keyswitching
works as it did in the Kontatk3 version of
Gtak (see the Gtak manual for more details).
The articulation can also be chosen from the
selection in the Instrument tab, in the example
above Staccato has been chosen. The
6.4 Dynamic Keyswitching
With Dynamic Keyswitching you can switch
notes while they are playing (see the Overview
section of the Kontakt4 Library Manual for
more details). The note is switched only for
the time the Dynamic keyswitch note is
playing, after that it reverts to the previous
Dynamic Keyswitching is interesting in the
Choir instruments, for instance you can
switch between sounds to make it sing 'm-am-a' !
The Kontakt4 library has 5 of these special
legato instruments:
 Violin ensemble (legato)
We have set all the Gtak4 instruments to use
the same keys for dynamic keyswitching,
starting 7 semitones above the first normal
keyswitch notes. For the EkeySwitch
instruments these correspond to:
Low E
Brass /
Fret 8
Fret 9
Fret 10
Fret 11
Fret 12
Sustain 2
Fret 13
Sustain 3
 Cello ensemble (legato)
 Viola ensemble (legato)
 Flute (legato)
 French Horn ensemble (legato)
They are in the Orchestral/Legacy VSL
Instruments/ section under the appropriate
instrument. For instance the violin is in
Orchestral/Legacy VSL Instruments/01
Violin ensemble/04 Legato Instruments/.
To quickly hear the legato effect in action, load
up the French Horn ensemble (legato). Then
try playing an open string and hammering on
the 7th fret.
6.5 VSL legato instruments
6.6 Monophonic instruments
The VSL legato instruments have 24 extra
samples for each normal sample. The extra
samples are played legato starting from a
different note (from 12 semitones below to 12
semitones above). This greatly increases the
realism of legato playing.
Many instruments are monophonic – they can
only play one note at a time. Where this is
important to the sound produced, the
Kontakt4 library instruments implement a
monophonic mode (mono mode) using a KSP
script called Unisono.
The standard VSL legato script was written for
keyboard players, who can only play legato by
playing single notes and overlapping the starts
and ends. This limits legato playing to playing
one note at a time.
We have made this script work with Gtak4,
but as monophonic playing is not natural to
guitars and Native Instruments have not really
documented this very well, we will take a
quick look at it here.
Guitarists play legato using hammers, slides
and bends - sometimes on more than one
string. Gtak4 harnesses this power by
detecting legato playing, triggering a new note,
and telling the custom Gtak4 Legato script
to trigger one of the special legato samples.
This means you can play legato chords.
One group of instruments where mono mode
is important is lead synths, because many of
their sounds were born in a time when it was
too expensive to implement more than one
note! In these instruments you can adjust the
most important settings of the Unisono script
from the Voicing section of the Instrument tab
as shown below.
the script editor, and finally selecting the
Unisono script's tab.
6.7 Harmonized Instruments
Many instruments have a Harmonization
function that plays extra harmony notes at
intervals you can set. This is usually controlled
by a knob labelled “Chord” in the Instrument
The controls are:
Solo: turns mono mode on and off
Legato: when on, mono mode is
implemented by bending the note that is
playing. When legato mode is off, new notes
are triggered (which sounds quite different).
Glide: when on the sound glides from one
note to another. This is very important to
certain lead synth sounds (often called
portamento). The knob underneath controls
how fast the pitch changes to get to the next
We have made this work with Gtak4 so that
when you slide and bend, generated harmony
notes are shifted by the same amount as the
note that generated them.
6.8 Arpeggiator Instruments
We have not modified the Arpeggiator script
because it got too confusing! However we have
set all the instruments that use the script to
have pitchbend quantized, and triggering new
notes. This means that bends will not be
smooth, but slides and hammer ons/pull offs
will work as expected.
These settings make a big difference to how it
feels to play the instrument, so experiment to
see what suits you.
If you change the pitchbend settings on
instruments that use the arpeggiator script
strange things will happen!
Mono mode opens up a lot of new playing
techniques. For instance, if you load the lead
synth shown above (Android Cabinet Lead
or any other instrument with similar settings),
strumming a chord will sound like a fast
arpeggio. Then damping the strings in reverse
order of the strum will sound an arpeggio
played the other way. Or try letting a low note
ring and then playing a melody, in between
the melody notes the low note will be
Instruments that feature the arpeggiator are in
the Synth/7 – Arpeggiator section.
There are also instruments that have a
polyphonic sequencer which we have set up in
the same way. These are in the Synth/8 –
Sequencer section.
The Gtak4 versions of these instruments have
a Performance View for the Arpeggiator or
Sequencer to make controlling them easier:
Note: many instruments in the World
collection (e.g. flutes) and some in the Bank
collection are set to play monophonically
using the Unisono script. However in these
instruments the only control is the on/off
Solo switch on the Instrument Panel.
To get predictable results it is important to
play cleanly when using portamento. For
instance, normally you might not notice a
brief accidentally triggered harmonic, but
with portamento on you will hear the effect on
the next note you play!
6.9 Micro Tuned Instruments
The Unisono script also has many more
advanced settings, such as note priority and
retriggering modes which can be accessed by
opening the instrument editor, then selecting
All the instruments in the World collection
(except percussion) have a Tuning panel where
you can set up a tuning offset for each note in
the scale. This gives added realism for
instruments that are not tuned to an equal
temperament scale (the standard in modern
western music).
7 The Config panel
You can make various configuration settings
in the Config panel. Click the Config Panel
button in the lower right hand corner to
switch between the main panel and the config
So, for instance, if you play a Db you will hear
the Db with micro tuning applied. In the
default settings of many of these instruments
the Db will be lower than an equal tempered
The following sections describe the various
It is very important to set the Key in the
Tuning panel to match your song, otherwise
the instrument will just sound badly tuned!
7.1 CC blocking
However, there is a problem. If you play a C
and then hammer on to a Db you will hear the
micro tuned C raised by an equal tempered
semitone – which is not the same thing!
You can get around this by setting pitchbend
to trigger a new note, but then bends will not
sound smooth.
We could not think of a way to get bends and
hammer ons to work correctly at the same
time, so we chose to make bends correct. If
you would prefer hammer ons to give correct
micro tuned notes then set pitchbend to
trigger new notes in the Gtak4 panel.
MIDI Continuous Controllers (CCs) are very
useful for controlling Kontatk3 instruments.
However, when a Guitar to MIDI converter is
controlling multiple instruments often you do
not want a CC to control all the instruments at
the same time. In this case, you can use
Gtak4's CC blocking function.
6.10 Getting the most from Kontakt
For instance, by default Kontakt4 library
instruments have CC7 set to control volume
(and CC11 pan position). If you have several
instruments you probably don't want to
change the volume of them all together.
If you cannot get quite the sound you want,
first try clicking on the Instrument panel. This
contains the most important instrument
For more extensive editing, click the wrench
icon to reveal the instrument editor. You can
change almost anything there, from source
samples and filters and modulators through to
insert and master effects.
There are four modes for CC blocking:
1) Muted: CCs are blocked whenever the
instrument is muted, either by its pedal or
by another pedal in the mute range.
2) Always: CCs are always blocked
3) Never: CCs are never blocked
4) Smart: CCs are blocked when the
instrument is muted, and also when a note
arrives and is not played for a reason like
the string not being enabled (the example
below should make this clearer!). This
mode is useful when using string enables or
fret or pick filters.
For example, if you have set the wheel
controller on your MIDI pickup (or an
expression pedal) to send CC7 (volume) and
you are using another pedal to switch between
two instruments using Pedal Mutes... you
should select CCBlock:Muted in both
instruments. The controller will then change
the volume of whichever instrument is not
currently muted.
7.2.1 Transpose presets
There is also a preset system for transpose
settings of the 6 strings.
There are various preset tunings you can
choose (they all assume your guitar is in
Note: You must move the controller to the
current value of the volume before the
volume will start changing.
Alternatively, if you are using two instruments
with one assigned to strings 1 to 4 and the
other instrument to strings 5 and 6, then you
should set CCBlock:Smart in both instruments.
Playing a note on strings 1 – 4 will then make
the controller control the first instrument's
volume. Playing a note on strings 5 or 6 will
make it control the second instrument.
standard tuning). There are also four slots for
storing your own user tunings.
MIDI CCs can also be set to control almost
anything in a Kontakt4 instrument by
setting MIDI CC as an external source for
modulation (see the Kontakt4 documentation
for more information). Gtak4's CC blocking
is useful for these too.
Note that the user tunings are saved with the
instrument (or script if you save it), and are
not shared between instruments. This is the
best we could do within the constraints of the
KSP script system.
If you want to use the settings from one
instrument in a second instrument you can
save Gtak4 and then load it in the second
instrument using the procedure described in
Section 9.
7.2 Transposition
The transposition section in the Config Panel
lets you transpose each string individually and
also all strings at once.
7.3 Open string settings
If your guitar is tuned to a non-standard
tuning and you want to use the fret filter, you
need to set the open string notes in the Config
panel. This is so that Gtak4 knows which note
corresponds to which fret.
If you are using a bass you can download a
custom version of Gtak4 with the open
strings already set, see Section 20.
For instance, if you set Transp.6: -2 the 6th
string will be transposed down 2 semitones
and a guitar in standard tuning will play as if it
were in drop D tuning.
If you set Transp.All: -12 the guitar will play
as if all the strings were tuned down an octave.
To set the open string notes:
1) click Learn to turn on learning
If you set Transp.All: -12 and Transp.6: -2
the guitar will play as if you had tuned it down
an octave and dropped the E another tone
to D.
2) play the open strings on your guitar until all
the open string notes have been recognised
3) click Learn again to turn off learning
7.9 Sustain 1 note/string
Click Reset to set the notes back to standard
guitar tuning.
Sust 1 note/string controls how notes are
sustained when the pedal is set to sustain
7.4 Base channel
Base Ch sets the lowest MIDI channel the
When Sust 1 note/string is on, only one
note per string is sustained, so playing a new
note on a string stops any previous note
played on that string.
guitar to MIDI converter sends on. It should
be set the same as in your guitar midi
When Sust 1 note/string is off, all notes
played are sustained until the pedal is
7.5 Strings
Strings sets the number of strings that your
instrument has. It affects the number of string
enable buttons shown and the number of
MIDI channels used to receive on.
7.10 Allow other MIDI channels
When AllowOtherMIDICh is set Gtak4 plays
notes on MIDI channels that do not
correspond to strings. This is useful, for
instance, if you want a keyboard to also
control the instrument. In this case you would
set the keyboard to send on a channel that is
not used by your Guitar to MIDI converter.
7.6 Pitchbend range
PB Range tells Gtak4 what the maximum value
of pitchbend means in terms of semitones. It
must be set to the same value as your guitar to
MIDI converter.
For example if Base Ch=1 and Strings=6 and
AllowOtherMIDICh is off, then notes on
channels 7->16 will not be played.
7.7 Pick Control settings
Pick Control only works with Axon Guitar to
MIDI converters. There are three modes for
Off: turns pick control off and hides all the
controls related to it. Set this if you don't
have an Axon or don't want to use pick
On: allows the use of the pick filter.
ToMod: maps pick control to the Modwheel
(CC1). This is useful because the modwheel
is already set to control important
parameters in many instruments.
8 Pedal Control using notes
You can control Gtak4's pedal functions by
playing notes using the Gtak note to CC
multiscript which gives you six 'virtual pedals'
mapped to six notes on your fretboard. To use
1) Load the Gtak4 multi (gtak4_multi.nkm)
2) Access the multiscript editor by clicking the
multiscript button as shown below (to the
left of AUX).
You also need to set your Axon to send pick
control as a CC (see section 3.4.1). The Pick
CC control must be set to the same CC number
as you set in the Axon.
3) Click the first tab to get to the Gtak note
to CC script (due to a bug in Kontakt4 the
tab may start out saying <empty>)
4) By default this multiscript is disabled, to
enable it click the Bypass button (the
button is grey when the multiscript is
7.8 New note velocity
NewNoteV sets the scaling of the velocity of new
notes when pitchbend is set to trigger new
notes. For instance, when it is set to 100% the
new notes are played at the same velocity as
the original note.
Once you have enabled the multiscript:
9 Using Gtak4 with other
1) Set the Midi Channel to match the channel
of the string you want to use for the notes
to CC function. By default this is set to 6,
which corresponds to the Low E string if
you have your Base Channel set to 1. If you
are using multiple MIDI ports in Kontakt4
you will have to choose the right one here
(A,B,C or D), otherwise just use A.
You can load Gtak4 into other Kontakt4
instruments you buy or create. Before you can
do this you have to save Gtak4 as a preset. To
do this:
1) Load any instrument containing Gtak4
2) Make any settings you want in Gtak4 (the
settings will be saved with the preset)
2) Set the Pitchbend range to match the
setting on your Guitar to MIDI converter.
3) Click the Wrench icon to open the
instrument editor
By default the script is set to respond to six
notes on the Low E string starting from fret 13
and going up to fret 18. These were chosen
because they give you the option of playing
them by tapping with your non-fretting hand.
4) Click the Script Editor button to open the
script editor (unless it is already open)
5) Click the Gtak4 tab
Below each note is a display showing what CC
number is sent (set to 127) when the note is
played. You can change the values of the notes
and the CC's they send individually.
6) Click Preset and select save preset...
7) Then choose a name and save (use the
default folder)
The six virtual pedals work like buttons on an
old car radio: when you press one down all the
others pop up. This makes it easy to keep track
of what the pedals are doing even if you can't
see the screen.
Once you have set up the multiscript you can
use Gtak4 just like you would with a
pedalboard, for instance to switch between
two sounds:
You can then load this preset into another
instrument. First load up the new instrument,
1) Click the Wrench icon to open the
instrument editor
2) Click the Script Editor button to open the
script editor (unless it is already open)
3) Click the first script slot tab
4) Click Preset, then user and select the
Gtak4 preset you saved before
If you have settings you use often, you can
save copies of Gtak4 with those settings
preset for loading later.
If you need more virtual pedals, we have also
set up a copy of the multiscript in the second
slot (mapped to the 5th string).
We have had to alter many of the scripts in the
Kontakt4 library to get them to work with
Gtak4. So, if you already have modified
versions of library instruments that you would
like to use with Gtak4, you will also need to
replace any altered scripts to get it to work.
Altered scripts have been renamed by adding
(Gtak4) after their names. Save these altered
scripts in the same way we saved Gtak4 above.
10 Setting up Kontakt4
The following settings can make working with
Gtak4 easier.
10.1 Setting the default multi
To set the Gtak4 multi to be the default multi:
1) Load the Gtak4 multi as described earlier.
Note: because of the strange behaviour of the
KSP scripting system, it is possible that
Gtak4 will not work with scripts in third
party instruments. If you have problems
contact us and we will see what we can do.
2) In the File menu, select save as default
From now on the Gtak4 multi will load when
you load Kontakt4.
10.2 Setting MIDI Omni
To set MIDI omni as the default for newly
loaded instruments:
1) Click on the cog icon to open the Main
2) Click on the Handling tab
3) For MIDI channel assignment for loaded
patches, select assign to omni.
10.3 Configuring Quick-load menus
It is much easier to load Gtak4 instruments if
they are in the Quick-load menu. To get the
Gtak4 instruments into the Quick-load menu,
click the “Quick” toolbar button to display the
Quick-load catalogue. Then navigate to the
Kontakt4 library in the file browser and drag
the Gtak4 directory into the Quick-load
catalogue's first column.
5) When the update has finished, you should
be able to easily find the Gtak4 instruments
as they have been tagged with Bank names
that start with “Gtak 4”
The new Quick-load catalogue has many
features, see Section 13 of the Kontakt4
Reference Manual for more details.
10.4 Setting up the database
Gtak4 instruments have all been tagged so
they can be loaded easily using the database
browser. First you will have to update your
1) If the File Browser is hidden, click the
folder icon to open it.
2) Select the Database tab and click DB
3) Make sure that the Locations being
scanned include your Kontakt4 library. If it
does not, then click Add (see the Kontakt4
manual for more details)
4) Click Update.
11 Custom Gtak4 downloads
12 Troubleshooting
Unfortunately, there is no central location
where you can make changes to settings in the
KSP scripting system. This means that if you
want to use a pitchbend range of 24 you would
have to go through each of the 1000
instruments in the library, change the
pitchbend range and save the instrument. Or
you could change the range each time you
loaded an instrument, but that would be very
Here are some ideas if things aren't working:
Visit the Gtak4 forum at to
see if anyone else has had similar problems.
Check that MIDI data is reaching Kontakt4 by
checking the MIDI connector icon next to the
MIDI Ch: field in the Instrument header - it
flickers when MIDI data is received.
If there are problems try strumming some
chords for a while, sometimes Gtak4 can
diagnose the problem. If it can it will print a
message in the status field (to the left of the
Config panel button).
To save you having to do this we have made
available custom Gtak4 downloads with
various different settings for things like
pitchbend range. Just go to the download
page, login, and click to go to the custom
downloads page. The form will look something
like this:
If MIDI seems OK but the instrument's level
meters are not moving, then check that the
instrument's volume is not turned down.
Sometimes things can send CC7=0 when you
are not expecting it.
If the instrument's meters are moving, but you
can't hear anything, there is probably some
problem between Kontakt4 and your
If slides, bends and hammer ons don't seem to
be reaching the right notes, then check the
pitchbend range is set correctly.
Make your selections then click download.
Finally, install the files as described in section
If normally played notes sometimes sound out
of tune, again check the pitchbend range.
If the custom option you need is not there,
contact us and we will see what we can do.
If you get messages about missing samples
when loading Gtak4 instruments, make sure
Gtak4 is installed in the correct directory and
the Kontakt4 library is also installed correctly.
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