Manual - Ashdown
#22832 - J-lo Pedal Ops
23/11/07
12:38
Page 1
Designed to meet the specific needs
of the modern bass player, Ashdown’s
Dual Band Compressor splits the signal
A unique, bass-specific overdrive
Why should guitar players have all the fun?
pedal providing a stunning range of
Ashdown's Bass Drive Plus pedal generates a wide
applies compression separately to both – fast attack
distortion effects as envisioned by Megadeth
range of bass distortion by splitting the signal
and decay for the high frequency and slow attack and decay
bassist James LoMenzo.
TRUE BYPASS SWITCHING
into high and low frequency bands and
into High and Low frequency bands and applying appropriate
for the low frequency or fundamental waveform of the note.
A high-quality chorus, just for bass players. In addition to the standard
types of distortion to either one or both. HF and LF distortion
The amount of compression applied to each is independently
Depth and Speed controls, the Plus part of this pedal can be switched in
have their own individual Drive controls with a separate Balance
variable and the balance between the high and low frequency
to provide flanging and a unique range of delay effects.
control to blend the two together. In this way distortion can be
components of the signal is also controllable as they are re-
Bass
Chorus Plus
True Bypass Switching
Bass
Drive Plus
added to the HF signal only maintaining
a full and fat bottom end.
Bass
combined into a single, full range output.
Dual Band Compression
True Bypass Switching
True Bypass Switching
It’s time to get funky with the Ashdown
Envelope Filter. Capable of a wide range of
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This earth-Shattering pedal generates a note
effects from auto-wah through to spaced-out, auto-
one octave below the note being played, at the same
triggered funky tones, the sweep of the filter can be either up or
volume and based on the waveform of the original signal.
down with selection of band-pass or high pass filter modes. A peak
By blending the sub-octave note with the original signal, bass players
control is provided to deepen the ‘Q’ for more extreme effects and the
can move from a subtle reinforcement of the sound to truckloads of
depth of the effect is controlled by the volume of each note as it’s played,
bone crushing tone. As a further Plus, distortion can be added to the
making this a truly creative and dynamic pedal.
sub-octave note, with the level of distorted sub-octave and
Bass
Envelope Plus
True Bypass Switching
Bass
Sub-Octave Plus
Bass Effects Pedals
degree of distortion both adjustable by the player.
True Bypass Switching
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#22832 - J-lo Pedal Ops
23/11/07
12:38
Page 2
Bass Dual Band Compressor
Bass Effects Pedals
Operating Instructions
All effects pedals in the Ashdown range have been
specifically designed for bass.
TRUE BYPASS SWITCHING
All effects pedals in the Ashdown range use ‘True
Bypass Switching’, this means when the effect is
bypassed then all electronic components within the
pedal are switched out of circuit, the Input jack
socket is then connected directly and only to the
Output jack socket ensuring no degradation of your
bass signal.
In most effects pedals the internal circuitry remains
connected even when the effect is bypassed. This
changes and degrades your bass signal. With ‘True
Bypass Switching’ when the effect is bypassed then
it is the same as if your bass were plugged directly
into the input of your amplifier.
All Ashdown effects have an LED that will light to
indicate when the effect is active.
INPUT & OUTPUT LEVEL CONTROLS
All Ashdown effects have Input and Output Level
controls. The Input Level control allows the user to
adjust the signal level from his bass to allow the
effect to work at its optimum. The Signal Level can
easily be monitored on the front panel VU Meter.
This is necessary as signal levels from different bass
guitars can vary over a very wide range especially
between Active and Passive instruments.
SETTING THE ‘INPUT’
With all Ashdown effects pedals always adjust the
‘Input’ so that the VU meter gives a reading of
between –7 and 0dB on the scale all the time you
are playing with only occasional peaks into the red
section.
ADJUSTING THE ‘OUTPUT’
The Output Level control allows the user to adjust a
perfect balance between the effect being switched
into circuit and the ‘True Bypass’ mode.
BATTERY
The internal 9v battery is activated when a jack plug
is inserted into the Instrument In jack socket. This
can be replaced by removing the battery
compartment door on the underside of the unit.
Always use an Alkaline battery type 6LR61 for
maximum life.
AC ADAPTER
Only ever use the special 9v AC adapter available
from Ashdown. This can be plugged into the DC
Connector on the back of the unit.
Bass Drive Plus
The Ashdown Bass Drive Plus is a bass specific distortion unit
providing a wide range of distortion effects. This operates in a totally
different way to all previous and existing distortion or overdrive
effects units. The approach is similar to the Dual Band Compressor in
that distortion can be added to either the high frequency content or
the low frequency content of the bass signal individually.
The thinking behind this is that distortion can be added to only the
high frequency content of the bass signal leaving the lower
frequencies completely untouched and thus preserving the solid
bottom end of the bass sound whilst still providing a very useable
distortion. It was found that the degree and type of distortion that
works best for bass needs to be different at low frequencies to that
for high frequencies. So what we have done is to split the bass
signal into two frequency bands and applied not only different
degrees of distortion to each band but also different types of
distortion character as well. The amount of distortion is individually
adjustable for the high frequency and low frequency band.
LF DRIVE – HF DRIVE
Two separate and different distortion circuits are employed in the
Bass Drive Plus effect pedal. One operating on the high frequencies
and another on the low frequencies. The LF Drive control adjusts
the amount of Drive or distortion added to the low frequency
content of the bass guitar signal. The HF Drive control adjusts the
amount of Drive or distortion added to the high frequency content
of the bass guitar signal.
The maximum amount of Drive available on each control is
dependent on the setting of the Input control. With this set for
optimum signal as described in the SETTING THE ‘INPUT’ section of
these instructions the degree of Drive will be what we consider to
be optimum for bass. If more distortion is required it is possible to
increase the setting of the Input control to provide this.
< BALANCE >
The < Balance > control provides adjustment of the balance
between high and low frequencies within the note for further
artistic expression. Set to its centre position i.e. 12 o’clock (with HF &
LF Drive set to zero) it provides an equal balance between low and
high frequencies. Turning to the right increases the high
frequencies and decreases the low frequencies. Turning to the left
Increases the low frequencies and decreases the high frequencies.
The Balance between high and low frequencies will vary
depending on the settings of the HF & LF Drive controls, this
Balance control can then be used to restore the HF/LF signal
balance.
A wide range of Distortion effects are available with this unit.
Try adding just HF Drive as explained earlier or just LF Drive or of
course mixtures of both. Use the Balance control for fine
adjustments to the signal HF/LF balance as these two Drive
controls are varied. We are sure there will be a setting ideal for
everybody’s tastes.
Technical specifications
HF Drive filter section
Filter frequency 180Hz
Filter roll off 12dB/octave
LF Drive filter section
Filter frequency 600Hz
Filter roll off 12dB/octave
Composite crossover point of the overlapping High and Low pass filters =
250Hz
HF Gain
0 to 60dB
LF Gain
0 to 30dB
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
DUAL BAND COMPRESSOR
The Ashdown Dual Band Compressor is a special kind of
compressor designed specifically for bass. It splits the Bass signal
into two frequency bands and applies compression individually to
each band. The degree of compression applied to either high or
low frequencies is individually adjustable by the user. These two
frequency bands are then re-combined into a single Full Range
signal with the balance between high and low frequencies
adjustable with the ‘EQ Balance’ control.
This approach towards Compression is necessary for bass because
a Fast Attack is required to catch the initial transient and high
frequency content of the bass note whereas a Slow Attack is
required for the low frequency or fundamental waveform of the
note to ensure the waveform is not distorted. If a Full Range
compressor is used for bass then a Fast attack will distort the low
frequency waveforms whereas a slow attack would fail to catch the
initial transient. This is also true of the Decay/Release portion of the
compression, a fairly fast decay is ideal for the high frequencies
whereas a slow decay is best for the low frequency content.
The Ashdown Dual Band Compressor therefore gives you the best
of both with Attack and Decay parameters already set to optimum
values for Low and High frequencies plus individual user
adjustment of the degree of compression applied to each portion
of the note, Low Comp & High Comp.
The Ashdown Dual Band Compressor can increase sustain on any
note or harmonic, smooth out playing dynamics, add definition to
fast runs, provide a switchable volume boost, provide a wide range
of EQ’s that are easily and instantly adjustable, provide High or Low
compression or any combination of the two and can function in
the effects loop or on the front end of any amplification system.
LOW COMP, HIGH COMP
The degree of compression applied to the low frequency content
of the bass signal is set using the Low Comp control. Applying
compression only to the low frequencies gives a fat bottom end to
the note, it can also smooth out playing dynamics and provide
additional sustain. All this without the loss of the transient or
attack portion of the note. The degree of compression applied to
the high frequency content of the bass signal is set using the High
Comp control. This compresses the attack part of the note and can
be used to good effect in limiting the transient on pulled or
slapped notes and can be used alone or in combination with the
Low Comp control. Try to use both these controls in moderation as
this will produce the most pleasing effect.
EQ BALANCE
The EQ Balance control provides adjustment of the balance between
high and low frequencies within the note for further artistic
expression. Set to its centre position i.e. 12 o’clock it provides an
equal balance between low and high frequencies. Turning to the
right increases the high frequencies and decreases the Low
frequencies. Turning to the left Increases the low frequencies and
decreases the high frequencies. This in fact this gives further uses for
this effects pedal where Low & High Compression can both be set to
zero and just the EQ Balance control be used to set a different EQ
that can be switched In or Out.
Bass Sub-Octave Plus
The Ashdown Sub Octave Plus generates a note one octave below
that of the bass guitar note at its Input. This Sub Octave note is
based on the waveform of the bass signal and its level will also
follow that of the original bass guitar signal. The lower octave note
generated can be mixed with the original bass note using the Sub
Level control. As a further Plus, Distortion can also be added to the
Sub Octave note with the degree of distortion and the level of the
distortion both being adjustable by the user, providing an entirely
new range of effects available to the modern bass player.
SUB LEVEL
The Sub Level control sets the level of volume of the clean sub
octave note produced by the Sub Octave Plus pedal. This can
therefore be balanced against the original bass guitar signal.
DIST DRIVE
Technical specifications
High pass filter section
Filter frequency 225Hz
Filter roll off 12dB/octave
Low pass filter section
Filter frequency 900Hz
Filter roll off 12dB/octave
Composite crossover point of the overlapping High and Low pass filters =
350Hz
High compression
Attack time 1mS
Decay time 70mS
Max comp ratio 8:1
Low compression
Attack time 22mS
Decay time 122mS
Max comp ratio 8:1
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
The range of controls on the Sub Octave Plus effect provides not
only the one octave below sound that most octave pedals produce
but also a whole range of new sounds available from the addition
of sub octave distortion that can be mixed in with both the clean
sub octave as well as the original bass guitar sound with infinite
variations of the balance between all 3 sounds.
The Ashdown Bass Chorus Plus is a bass specific unit providing a
wide range of Chorus, Flanging and Resonant Filter effects. Most
Chorus units have Speed and Depth controls and with these it is
always necessary to reduce the Depth as the Speed is increased
otherwise the resultant sound becomes unusable because the notes
pitch is over modulated. With the Bass Chorus Plus we have
combined the adjustment of Speed and Depth into one control that
automatically decreases the Depth as the Speed is increased.
To give some degree of pitch modulation adjustment we have
introduced a ‘Range’ control.
An Envelope Filter effect is simply a variable Band Pass or Low Pass
electronic filter circuit where the ‘sweep’ through its filter range is
controlled by the level of signal passing through the unit. In other
words the device is dynamically controlled by the player i.e. the
harder the note is played the greater the frequency range through
which the sweep of the filter passes. This Sweep can usually be
chosen to be in an Upward direction i.e. the filter frequency
increases with an increase in signal level or in a Downward direction
i.e. the filter starts at a high frequency and sweeps downward with
the degree of sweep following the signal level.
It is important to set the Input level to the correct reading on the VU
meter as this will affect the range and sensitivity of the envelope
filter.
PEAK
The Peak control adjusts the sharpness of the Peak or ‘Q’ of the filter
response. Increasing the setting of this control gives a much more
emphasised range of filter harmonics in the instruments tone. Use
the low range for more natural sounding filter sweeps and the
higher settings for more exaggerated filter effects.
UP/DOWN
The Up/Down control determines if the sweep through the filters
frequency range is in an Up direction i.e. the frequency of the filter
increases as the note is played harder, or in a Down direction i.e. the
filter starts at a high frequency and sweeps downward as the note is
played harder. In most Envelope Filter pedals this is a switched
selection i.e. you can choose either Up or Down.
What we have done is to provide you with a variable degree of both
the Up and Down ranges on a single rotary control with fully Up at
one end of the control and fully Down at the other. With the control
in its centre position there is no sweep effect at all, this is zero
setting for both Up and Down. Turning the control clockwise from its
centre position gradually increases the Down sweeping range whilst
turning anticlockwise from its centre position gradually increases the
Up sweeping range. It is therefore possible to precisely adjust the
BP/LP stands for Band Pass or Low Pass filter frequency responses,
Band Pass is like a Wah-Wah where a narrow band of frequencies is
swept through with the filter rejecting all frequencies either side of
this pass band. Low Pass is like a very powerful Treble control i.e.
when turned down you hear only the low frequencies and as the
frequency range is swept upward the mid and then the high
frequencies are added to the low frequencies.
In a way Low Pass is more useful for bass as the low frequencies are
always retained within the sound, however Band Pass is a more
exaggerated effect but makes the sound too thin at the high
frequency end of the range. Usually an Envelope Filter will offer you
a switched choice of either Band Pass or Low Pass but what we
discovered was that mixing the two together provided a much more
useful sound than either one alone.
We have therefore made the BP/LP control work in a similar way to
the Up/Down rotary control i.e. one end of the control is fully Band
Pass and the other end of the control is fully Low Pass, thus
anywhere in-between is a mixture of the two, with the centre
position being equal proportions of Band Pass and Low Pass.
Technical specifications
Filter Range
30Hz to 12kHz
Filter roll off 24dB/octave
Filter Peak
Q Infinitely variable from 3 to 10
BP/LP
Single rotary control selects BP, LP or a continuously variable mix of both
Up/Down
Up & Down ranges continuously variable from zero to full sweep
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
The FREQ control adjusts the band of mid frequencies that are to
be subjected to the distortion effect. The range can be swept from
200Hz to 2.2kHz. The FREQ control also works in conjunction with
the ‘Q’ switch. With the ‘Q’ switch in its down position the
bandwidth of the variable frequency control is set to 1 octave. With
the ‘Q’ switch in its up position the bandwidth is half octave which
gives a more peaked and focused effect.
The level of the distorted sub octave signal can be balanced
against the clean sub octave and the original bass guitar signal
using the Dist Level control.
The Ashdown Envelope Filter is a bass specific unit providing a wide
range of automatic filter opening and closing or ‘sweeping’ effects.
Although the controls perform similar functions to other Envelope
Filter effects you will find that a much wider range of effects are
available from this unit than from most Envelope Filter effects
pedals. More of the reasons for this below.
With our unique Chorus/Flange rotary control you can morph from
Chorus into Flanging providing ultimate control over the specific
degree of flanging introduced into the Chorus effect. The automatic
‘sweep’ of the filter effect can also be disabled with the ‘Filter’ switch.
In this mode the ‘Speed’ control provides a means to manually
sweep through the filter range providing a spectrum of resonant
filter effects.
It is important to set the Input level to the correct reading on the VU
meter as this will ensure the unit is working at its optimum.
SPEED
The Speed control adjusts the rate of the automatic sweep back and
forth through the filter range for both Chorus and Flanging.
There is no actual Depth control on the Bass Chorus Plus because we
have combined the functions of Speed and Depth into one control
that automatically decreases the Depth as the Speed is increased.
The reason for this is that as the Speed of the filter sweep is
increased, it is always necessary to reduce the Depth of the effect to
prevent excessive pitch modulation destroying the actual pitch of
the note. This approach saves time in selecting different Speed
settings as it is only necessary to adjust one control.
We have however retained some degree of pitch modulation
adjustment by providing a Range control that does not need
readjusting each time the Speed is altered. In Filter mode the Speed
control provides a means to manually sweep through the range of
Resonant Comb Filter effects available.
RANGE
The RANGE control provides fine adjustment over the degree of
pitch modulation introduced to either the Chorus or Flange effects.
This has a greater degree of control over the flanging effects
because the harmonics within the note are considerably more
The LoMenzo Hyper Drive is a bass specific distortion unit
providing a unique range of distortion effects as envisioned by
James LoMenzo, bassist for Megadeth. The operation of this
distortion pedal is totally unique and unlike any previous and
existing distortion or overdrive effects units. A band of frequencies
within the Mid range of the bass signal is filtered out and the
distortion effect is added only to this band of frequencies. The
filtered frequencies can be ‘tuned’ to the precise range that gives
the optimum effect. The degree of distortion available is variable
from a slight effect only to well over the top, allowing for a new
range of extreme effects for bass to be produced. The resultant
distortion effect can be mixed in with the original ‘Dry’ bass signal
maintaining a full bodied powerful bass character with distortion
overtones.
FREQ CONTROL & ‘Q’ SWITCH
DIST LEVEL
Bass Chorus Plus
BP/LP
Sub Octave
Pitch - 1 octave below root note
Waveform - Sampled from original note
Envelope - Follows original volume envelope
Sub Bandwidth – 10 to 160Hz
Distortion Drive Gain
0 to 30dB
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
Distortion can be added to the sub octave not generated and the
Dist Drive control is used to adjust the degree of Drive or
Distortion that is added to the original sub octave signal.
Bass Envelope Filter
degree of either the Up or Down frequency sweep exactly to your
liking.
Technical specifications
Technical specifications
Freq control filter section
Filter type – State variable band Pass
Filter frequency tunable range 200Hz to 2.2kHz
Bandwidth selectable with ‘Q’ switch – 1 octave or 1/2 octave
Drive control
0 to 60dB
Mix control
Infinite Mix between Dry bass signal and Effected signal
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
DRIVE & +10dB SWITCH
The DRIVE control adjusts the degree of distortion added to the
mid frequency band selected above. The range of this control is
very wide going from almost no distortion on minimum (this is
also dependent on the setting of the INPUT control) to well over
the top on maximum. The +10dB switch works in conjunction with
this control giving a minimum of +10dB boost to any setting of the
DRIVE control providing extreme distortion effects with long
sustain.
emphasised than in chorusing. This control also has some effect in
Filter mode.
CHORUS/FLANGE
With this control in its fully anti-clockwise position all effects are
Chorus only. As the control is advanced Flanging is introduce to the
Chorus effect until at its fully clockwise or maximum setting full
Flanging is achieved.
This Chorus/Flange control provides a range of effects between
Chorus and Flanging that are very useable and infinitely variable.
FILTER SWITCH
The Filter switch disables the automatic ‘sweep’ through the filter
range in both Chorus and Flange. Once the automatic sweep has
been disabled the Speed control can be used to manually adjust the
setting of the now static filter range providing a host of resonant
comb filter effects. The Range control also provides further fine
tuning to this adjustment. The most prominent resonant filter effects
are achieved with the Chorus/Flange control set at maximum i.e. full
Flange.
Technical specifications
Delay Filter Range
60Hz to 12kHz
Filter Peak
Comb Filter with very high Q resonant peaks
Frequency sweep speed
0.2Hz to 8Hz
Chorus/Flange
Continuously variable from Chorus to full Flange
Input
Impedance 470k Ohms
Signal level –10dBv to 0dBv
Output
Impedance 10k Ohms
Signal level variable –10dBv to 0dBv
Supply
Internal 9v battery
External supply 9v DC adaptor. Centre pin negative.
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