Yamaha SK15 Owner's manual

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Introduction
Thank you very much for your purchase of the Yamaha SK15 Symphonic
Ensemble. The SK15 offers versatile organ, strings and poly-synth sections
that can be used indepedently or combined for an extensive variety of warm,
ensemble-like effects.
We urge you to read the contents of this owner’s manual carefully in order to
make full use of all the SKI15's extensive capabilities.
CONTENTS
. Page
Рге-Шзе СачНоп$ ........................ 2
Featuresand Functions .................... 3
Connections .....oo._«_0orrereosrernvoreonmetsoo 5
Operation: OUTPUT/VOICE ............... 6
ORGAN/STRING............... 7
POLYSYNTH ...........c..... 8
POLYSYNTH/EG .............. 9
EFFECTS .......... ccc... 10
Block Diagram/Specifications ............... 11
Sound Memo ....eoeñeceoncrrsreorronservecoo 12
Service ....Wo.eocecoorenacoonroar noma a 14
Pre-Use Cautions
Location Avoid placing your Symphonic Ensemble in direct sunlight or close to a source of
heat. It is also important to avoid locations in which the instrument is likely to be
subject to vibration, excessive dust, cold or moisture.
Power Cord Always grip the power plug directly when unplugging. Removing the
power plug from the wall socket by pulling on the power cord can result
in damage to or shorting of the power cord.
Be sure to unplug your Symphonic Ensemble if you will not be using it
for an extended period of time.
Relocation when moving the Symphonic Ensemble once it has been set up, be sure to
disconnect all cords that connect the instrument to other equipment. This
will help to prevent accidental damage to or shorting of interconnection
cables.
Connection Follow the “CONNECTIONS” instructions given on page 5 of this manual
carefully when setting up your Symphonic Ensemble.
Connection errors may lead to serious damage to the Symphonic Ensemble,
amplifier and speakers.
Cleaning Do not use solvents such as benzine or thinner to clean your Symphonic
Ensemble as these may cause discoloration or staining of the instument's exterior.
Use a soft, dry cloth.
Other Appliances Since your Symphonic Ensemble incorporates a consider-
able amount of digital circuitry, it is advisable to use it
where it will not be influenced by electromagnetic radiation
from appliances such as televisions, radios, etc.
Features and Functions
OUTPUT
This is essentially a volume control that adjusts the over-
all output level of the Symphonic Ensemble.
PITCH
Adjusts the overall pitch of the Symphonic Ensemble
permitting easy tuning with other instruments.
TREMOLO/ENSEMBLE
This is an effects block that offers one-touch selection
of delicate tremolo and rich, multi-instrument ensemble
effects.
VOICE
Independent selectors are provided for the ORGAN,
STRING and POLY-SYNTH voices. The voices can be
selected individually or in any combination.
VIBRATO
Delay, speed and depth levers offer full control over the
vibrato effect. The delay control permits creation of
particularly natural-sounding vibrato effects.
CONTROL BLOCK
The controls in this block determine the timbre and
quality of organ, string and poly-synth sounds.
POLY-SYNTH (STRING)/SLOW ATTACK
When this function is activated, poly-synth and
strings sounds begin with a slow, soft attack.
SUSTAIN (Switch and lever)
Adjusts sustain time (the time it takes for the sound
to fade out after the keys are released} of the organ,
poly-synth and string sounds.
BRILLIANCE
Adjusts the overall tonal quality of the organ and
string sounds through a range extending from “bright”
to “mellow.”
{ORGAN)
PERCUSSIVE
Adds percussive accent to the attack portion of
organ notes.
ORGAN 16" — 2° TONE LEVERS
By adding or subtracting component harmonics
using these levers, virtually any type of organ sound
can be created.
{STRING
16’, 8° TONE LEVERS
These levers determine the timbre of the string sound.
OUTPUT PITCH
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TREMOLO/ENSEMBLE VOICE
SPEED TREMOLO ORGAN POLY- ORGAN STRING POLY-
SYNTH SYNTH
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Symphonic Ensemble SK15
{POLY-SYNTH)
VOLUME
Independently controls the volume of the poly-
synth sound.
FEET
Permits proportionate mixing of the poly-synth 16’
and 8” sound sources.
CUT OFF FREQ
Produces the basic poly-synth sound by determining
the cut off frequency of the synthesizer's filter.
RESONANCE
Permits emphasis of frequencies near the filter's
outoff point, thereby providing further control
over poly-synth sound quality.
EG DEPTH
Adjusts the degree to which the envelope generator
(EG) affects the filter cutoff frequency.
ATTACK TIME / DECAY TIME / SUSTAIN LEVEL /
RELEASE TIME (Envelope generator controls)
These controls permit creation of time-based varia-
tions in the tonal quality of the poly-synth sound.
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OUTPUT FOOT PHONES
CONTROL
VOLUME
Connections
e Before turning the unit ON, make sure that the VOLTAGE SELECTOR is properly set according to the line voltage
in your area.
Since the SK15 does not include a built-in power amplifier, an external keyboard amplifier or power amplifier
‚and speaker(s) must be employed when headphones are not used.
(1) POWER CORD
Plug the SK15 power cord into a convenient AC wall
outlet. Maximum power consumption of the SK15
IS 30 watts.
e |f during normal operation the SK 15's fuse should
burn out, a possible malfunction is indicated. Take
the instrument to your nearest Yamaha dealer or
service station for a thorough checkup as soon
as possible.
(2) OUTPUT
This standard 1/4" phone jack is for connection to
an external keyboard amplifier, power amplifier or
mixer. The SK15 output specifications are —10 dB/
600 ohms, providing compatibility with virtually
any conventional keyboard amplifier.
(3 FOOT CONTROL (VOLUME)
Permits connection of an optional foot controller
(FC-3A) for convenient foot control of overall
volume,
(4) PHONES
Accepts a pair of standard stereo or mono head-
phones, ideally with an impedance of between 8 and
150 ohms.
®
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MOV 220V
FUSE 130V 230V
T315mA VOLTAGE SELECTOR
(General Model)
e Once all connections have been made, be sure to
double check that no connection errors have been
made before turning power to the instrument on.
The following section of this manual describes the
operation of each control in detail. We suggest
that you connect the SK15 to a keyboard ampli-
fier and try out each control as it is described.
(5) POWER
The power switch is located on the instrument's
rear panel, adjacent to the power cord. Flipping this
switch to the upper position turns power to the
unit on, and automatically light the indicators of all
the VOICE Selectors on the front panel.
(6) VOLTAGE SELECTOR (General Model only)
This selector must be set to comply with the AC line
voltage in your area. Improper VOLTAGE-SELECT-
OR setting can result in impaired performance and
even cause permanent damage to the instrument.
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Speaker with built-in
Amp. or keyboard amp.
(A4115H)
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FOOT CONTROLLER
FC-3A
Connect a speaker system
via power amp. or speaker
with built-in amp. from the
OUTPUT terminal.
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Operations OUTPUT / VOICE
| Initially, set all panel controls as shown in the illustration below. Upon raising the level of the OUTPUT control,
a mixture of the organ, string and poly-synth sounds will be heard when a key is pressed.
BASIC SETTING
Do | М ЕЕ
Controls the instrument's overall output volume level.
OQ OUTPUT ? e e
e When a foot controller is plugged into the rear-
panel FOOT CONTROL jack, overall volume is
controlled via the foot controller. ,
10 — +
@ PITCH TREMOLO, ENSEMBLE VOICE
This is a tuning control. Turning this knob towards
the “+” end of the scale increases the overall pitch of
the instrument, while turning it towards the “— с = = = = = =
end of the scale decreases pitch.
SPEED TREMOLO ORGAN POLY ORGAN STRING POLY-
SYNTH SYNTH
VOICE
© ORGAN, STRING, POLY-SYNTH
These selectors determine the voice or voices to be
output. All these switches are automatically activated
when power to the unit is initially turned on. In
this state, pressing any of the VOICE switches causes OT TA UU UU NON:
its indicator LED to go out, while pressing the switch , ° ° : :
a second time will cause the indicator LED to light | | | o
again. | | | | —
e If all the VOICE switches are off, no sound will n À | | © —
be output from the instrument. A | D
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Keyboard .
When using the SK15's 8' sound source (as in the 7D
BASIC SETTING given above), the 49-key keyboard C2 C3 C4 C5 C6
covers a four-octave range from C2 to C6.
Operations
ORGAN/STRING
The SK15 organ sound is created by adding varying amounts of the 16’ through 2’ harmonics. The individual sound
controlled by each of these tone levers is a pure tone with no inherent harmonics. Adding these tones at varying levels.
however, creates a harmonic relationship that produces the rich, vibrant sound of an organ.
The string sound, on the other hand, is derived from a particularly harmonic-rich sound source. The string sound is
especially effective when used with the SK15’s ensemble effect.
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VOLUME FEET CUT OFF REDO
FREQ NANC
{CONTROL BLOCK)
Controls @ through @ , described below, provide
general control over the organ, string and poly-synth
sound.
@ POLY-SYNTH SLOW ATTACK
When this switch is turned on, the initial attack of the
sound when a key is pressed is lengthened for a
“smooth” effect. The SLOW ATTACK switch affects
the string and poly-synth sounds only.
O, O SUSTAIN (Switch and lever)
Turning the sustain switch on causes a note played on
the keyboard to fade out gradually after the key is
released. The length of sustain (the time it takes for
the note to fade out) is controlled by the sustain lever.
e The sustain switch and lever affect the organ,
string and poly-synth sounds.
@ BRILLIANCE
Adjusts the tonal color of the organ and string sounds.
If this lever is set towards the “ +” end of the scale,
a bright, crisp sound results. Setting it to the ” — ”
end of the scale produces a softer, rounder sound.
® Normally, the brilliance control should be set to
its © 0 ” (center click stop) position. According to
changes in the mood of the music it can then be
reset to create an appropriately bright or mellow
atmosphere.
{ORGAN BLOCK)»
© PERCUSSIVE
Adds a percussive accent to the initial attack of organ
sounds created using the organ tone levers @ . Set
at ” 0” there is no percussive effect. The more this
lever is set towards the “ 10 * end of the scale, the
stronger the percussive effect.
e No percussive effect is produced if a key is pressed
while previously pressed keys are held.
© TONE LEVERS (16' — 2)
These controls permit complete freedom in selecting
and proportioning the harmonic components of the
organ sound. In the case of each tone lever,a “ 0 ”
setting produces no output at the respective fre-
quency (harmonic), while a “* 10 “ setting produces
maximum output.
{STRING BLOCK?
{ TONE LEVERS (16°, 8’)
These levers are used to create -the desired string
sound in essentially the same way as the organ tone
levers.
Operations
POLY-SYNTH
Unlike the organ and string sounds, the poly-synth sound is created by selectively filtering out certain harmonics and
emphasizing certain others from a harmonic-rich sound source.
Before studying the functions of the controls, press the POLY-SYNTH VOICE selector and set the poly-synth con-
trols as shown in the illustration below.
® Y ®
®
POLY-SYNTH
VOLUME
EQ
FEET CUT OFF RESO-
FR
ATTACK DECAY SUSTAIN RELEASE
TIME TIME LEVEL TIME
EG
NANCE DEFTH
{POLY-SYNTH BLOCK)
O VOLUME
Controls the overall volume (level) of the poly-synth
sound. Since the volume of the poly-synth sound
varies according to the settings of the CUT OFF
FREQ @ and RESONANCE @ levers, etc. the
VOLUME lever is generally used to balance the
poly-synth volume level with the organ and string
sounds.
QQ FEET
This lever permits proportionate mixing of the poly-
synths 8' and 16" sound sources. If this lever is set
fully to the 8’ end of the scale, only the 8" sound
source is output. At the 16" end of the scale, only
the 16° sound source is output. Intermediate set-
ting provide proportionately mixed output from
both sound sources.
FEET Controls
В’
16’
(® CUT OFF FREQ
This control is the most important in creating the
poly-synth overall sound quality. The farther this
lever is set towards the “L” end of the scale, the more
upper harmonics are cut off by the internal filter,
producing increasingly “round” tonality. Set all the
way to the “L” end of the scale, the fundamental
frequency may be cut off and no or less sound
will be output.
8'+16'
@ RESONANCE
Setting this lever to the “H” end of the scale em-
phasizes those harmonics in the frequency response
in the area of the CUT OFF FREQUENCY. The
results produced by the RESONANCE control vary
largely depending on the setting of the CUT OFF
FREQUENCY control, thereby permitting a vast
range of tonal variation.
CUT OFF FREQUENCY WAVEFORMS
E |
This setting produces a
CUT OFF
FREQ
softer sound.
—
CUT OFF
FREQ
This setting produces
a sharp sound.
CUT OFF FREQUENCY AND RESONANCE
With CUT OFF FREN con-
trol at a high setting, rasing
the RESONANCE control
causes very little change
in sound.
CUT OFF RESO-
FREQ NANCE
If CUT OFF FREQ is
moved to a lower setting, a
considerable change in
sound will occur.
CUT OFF RESO-
FREQ NANCE
©
Operations
POLY-SYNTH/EG
All levers from the EG DEPTH control ® to the RELEASE TIME control ® are used to adjust the tonal “shape”
of the poly-synth sound from the time it is initiated to the time it cuts off or fades out.
ТУТ
B'
POLY-SYNTH
VOLUME
FEET CUTOFF RESO- EG ATTACK DECAY SUSTAIN RELEASE
FREQ NANCE DEPTH TIME TIME LEVEL TIME
O EG DEPTH
Controls the amount of tonal change produced by
the four levers to its right.
e In order to easily ascertain the effect of these
controls, set the CUT OFF FREQ lever to its
center position, the RESONANCE lever to a high
position on its scale, and the EG DEPTH lever to
its maximum position. Then try out the EG
controls @ through ® .
POLY-SYNTH
VOLUME
FEET CUT OFF RESC- EG ATTACK DECAY SUSTAIN RELEASE
FREQ NANCE DEPTH TIME TIME LEVEL TIME
O ATTACK TIME
Adjusts the time between keyboard attack and
maximum tonal change in the sound. The farther
this lever is set to the “L” end of the scale the longer
it takes for maximum tonal change to occur.
O DECAY TIME
Adjusts the time required for the sound to return to
its original tonality after maximum tonal change
has been reached as determined by the attack time
control.
The further this lever is set to the “L” end of the
scale the longer it takes for the souna to return to
its original tonality.
©
@® SUSTAIN LEVEL
Determines the constant tonal color that continues
after the attack and decay functions have ended
(and a key is held).
The effect of the controls described below on the
poly-synth filter envelope is illustrated graphically below.
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RELEASE TIME lever ®
O RELEASE TIME
Adjusts the change in tonality that occurs after the
keyboard has been released.
e This lever will produce no effect if the sustain
switch @ is off. For best results, turn the sustain
switch @ on and set the sustain lever @ (NOT the
SUSTAIN LEVEL lever) to the same position as
the RELEASE TIME lever.
Operations
Effects
The SK15 offers high-quality built-in vibrato, tremolo and ensemble effects that provide a broad range of variations
on the basic sounds produced by the organ, string and poly-synth sections.
TREMOLO/ ENSEMBLE Ve
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SPEED TREMOLO ORGAN POL Y- ORGAN ST
SYNTH
{TREMOLO/ENSEMBLE BLOCK)
The tremolo and ensemble effects can be applied to the
organ, string and poly-synth sounds. Both effects, how-
ever, cannot be used simultaneously.
ED SPEED
Electronically varies the speed of the tremolo effect.
If this switch is pressed, the indicator lights and the
tremolo speed gradually increases (simulating a
mechanical rotating speaker sound), if it is then
pressed a second time the indicator goes out and
the tremolo speed gradually decreases.
@ TREMOLO
Selects either tremolo or ensemble operation. When
this switch is pressed and the indicator lights, the
tremolo effect is active. If the switch is pressed again,
the ensemble effect will become active.
@ ORGAN
Turning this switch on applies the tremolo or en-
semble effect to the organ sound.
B POLY-SYNTH
Turning this switch on applies the tremolo or en-
semble effect to the poly-synth sound.
ICE VIBRATO
L—— F— 10-—
RING POLY- 5 As - o -
SYNTH lam EH =3
DELAY SPEED DEPTH
{VIBRATO BLOCK)
O DELAY
Determines the length of time between the initiation
of a sound (key pressed) and the beginning of the
vibrato effect. Set at 'S”, no delay is produced, while
settings toward the “L” end of the scale produce
increasingly longer delays.
é SPEED
Controls the vibrato speed. Settings towards the “F”
end of the scale produce a faster vibrato.
O DEPTH
Controls the strength or amount of vibrato applied to
the basic sound. Set to “0”, no vibrato is produced.
Settings towards the “10” end of the scale produce
a deeper vibrato effect.
Block Diagram/ Specifications
POLY-
PITCH DELAY SPEED ORGAN SYNTH
y z 3 | Y = |= [ ENSEMBLE
SLOW SUST-
DEPTH ATTACK AIN
— ' VOICE —
8 16”
ORGAN — x — BRILLIANCE OUTPUT OUTPUT
—[— Lu ee rte
GENERATOR | | E д u X 7
Te ORGAN <
nw > o A
E Ls
о
à À
— E 7 PHONES
C= ec O
STRING FILTER
+ — ORGAN POLY-
> GENERATOR[ 1 | \ | > TREMOLO FOOT CONT.
STRING
KEY BOARD POLY-SYNTH FILTER
8
Ca2~-Cé E ,
[-3 VOLUME poLy-
Y SYNTH
A EG. DEPTH
EG. fc : CUTOFF FREQ
Q : RESONANCE
AXE A : ATTACK TIME
D : DECAY TIME
fc Q A D SR S : SUSTAIN LEVEL
R : RELEASE TIME
SPECIFICATIONS
Simultaneous Notes . . . 7 (First note priority) POLY-SYNTH Section VOLUME :0~10
Keyboard ......... 49 keys, C2 — C6 4 octaves FEET : 8° +16"
OUTPUT Section, . . . . MASTER VOLUME CUT OFF FREQ : 10 octaves
PITCH Section .. .. . . PITCH : 438Hz ~450Hz, 8',A3 RESONANCE :Q;0.5-10
TREMOLO/ENSEMBLE. SPEED : ON/OFF EG DEPTH : 0 ~ 10 octaves
TREMOLO: ON ; TREMOLO/ ATTACK TIME : 3msec ~ 3sec
OFF ; ENSEMBLE DECAY TIME : 30msec ~ 30sec
ORGAN : ON/OFF SUSTAIN LEVEL: 0 ~10
POLY-SYNTH : ON/OFF RELEASE TIME : 30msec ~ 30sec
VOICE........... ORGAN : ON/OFF REAR PANEL ...... PHONES :8 ~150 ohms
STRING : ON/OFF FOOT CONTROL : FC-3A (option)
POLY-SYNTH : ON/OFF OUTPUT :-—10dBm/6000hms
VIBRATO ......... DELAY : 0 + 2.5sec
SPEED :15+7Hz OTHERS
DEPTH :0~10 POWER REQUIREMENTS
CONTROLS ....... POLY-SYNTH : SLOW ATTACK U.S. 8% Canadian models ........, 120V, 60Hz 30 watts
ORGAN Section
STRING Section
Ф
SUSTAIN switch : ON/OFF
SUSTAIN lever : 0 ~2sec
BRILLANCE tt ~0~—
PERCUSSIVE : 0 ~10
Tone Levers :16', 8', 5°-1/3, 4", 2
Tone Levers :16', 8"
. . . Selectable (110 — 130V/220V — 230V)
50/60Hz 30 watts
adorna 818 x 133.5 x 357 (mm)
(32-3/16" x 5-1/4" x 14-1/16")
1 2 4 8 6 0 6 1 0 4 8 8 1 1 1 4 400 0 10.3kg (22.7 Ibs)
Rosewood-grain cabinet
General model
DIMENSIONS (W x H xD)
WEIGHT
FINISH
Specifications subject to change due to improvement purpose.
Sound Memo.
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= = = = = = = = = = = = = = = = = = = = = = = = = = =
EE Er wr Tw ож = — ma mm mh mm a mm mm mm mom mE EW OT EW WW WM OW OT WM OE — mow = = = = = = — = мо = меж кож = нот = = = = = = = = оао шото = = ое = = = = = = == — — = = оно оное = = = = = = = = = = —
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Service
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK. DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE!
THERE ARE NO USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING TO A QUALIFIED SERVICE PERSONNEL.
SERVICE
The SK15 is supported by Yamaha's worldwide network of qualified dealer
service personnel. In the event of a problem, contact your nearest Yamaha dealer
or authorized service center.
СЮ УАМАНА
OUTPUT PITCH
TREMOLO/ENSEMBLE VOICE VIBRATO
POLY-
a | E | Ш SYNTH
ol Lo] a Do I I to y
= В -
SPEED TREMOLO ORGAN POLY- EU CROSS sE Sk CH ATTACK OTAN
SYNTH
DELAY SPEED
DEPTH f- ——
[0OMD-40] 81103 — @ Printed
in Japan