/ VOCODER /
The SVC-350 is a rack mount type
vocoder designed to accept external
inputs. It is easy to use both in the
studio and o n the stage.
BEFORE OPERATING
FEATURES
Ciear, high quality vocodei sound.
* T h e vocoder produces sound whose
expression follows the expression of the
input voice.
Includes uniquevoice character controls.
W i t h the speciaily designed chorus
circuit, a solo voice input can become
a large chorus.
aSpeciai hold circuit will hold the
vocoder tone quality by means of an
external foot switch.
* T w o separate inputs allow sirnultaneous use of an electrlc gultar and a
keyboard instrument such as a synthesizer, strings, etc.
* T o enrich the guitar sound, a
special compressor and a harmonic
control circuit are included in the guitar
input.
T w o separate output jacks, one for a
vocal amplifier and the other ior a guitar
amplifier.
*lnciudes
circuit.
a headphone monitoring
Check with your local Roland dealer
if you want to use theSVC-350in a
foreign country.
*Plug theSVC-350in before turning
on the power switch.
PRECAUTIONS
D o n o t open this unit.
Unplug this unit when it is not to be
used for long periods of time. Unplug
by grasping the plug rather than pull~ng
on the cord.
Be careful not to place heavy objects
on the power cord.
Avoid uslng this unit in very high or
low temperature locations. Also keep it
away from heaters and air-conditioners
since this type of equipment will aifect
circuit and pitch stability.
Avoid usmg this unit in very dusty or
h u m ~ places.
d
*
If it IS necessary to use t h ~ su n ~in
t an
area with neon or fluorescent lights,
keep it as far away irom these lights as
possible since they will induce high
levels of noise. Sometimes changing
the angle of this unlt in relation to the
lights will help reduce noise.
When connect~ngthis unit, plug the
cord into the external amplifier i r s t ,
then plug the other end of the cord into
the SVC-350 output. To disconnect, remove the cord from the SVC-350 iirst,
then from the ampliiier.
@ T O clean this unit, wlpe with a cloth
dampened with a neutral cleanser. D o
not use solvents such as paint thinner.
CONNECTIONS
PEDAL SWITCH
If both microphona input. .,a
phonaisck has priori,"
used. th. atandsrd
HEADPHONE
RH-10
.GUITAR AMP
OPERATION
7. After rnakmg the connections shcwn
tr the drawng, set the controls as
shown above and turn on the POWER
switch@
3. A d j u s t i n g t h e o u t p u t level:
Ill. Set the BALANCE control@ at
DiRECT MIC and the VOLUME control
@between 5 and 7.
2. A d j u s t i n g t h e i n p u t levels:
ill M i c r o p h o n e level
12) Speak or sing into the microphone.
Set the OUTPUT LEVEL switch a)
(when using VOCAL AMP OUTPUTS
@@only) and the externai amplifier
volume control f o r t h e des~redsound
level
Set the MICROPHONE LEVEL control
@ s o that the green indicator @ lights
and so that the red indcator O d o e s
not light even w t l i loud passages.
121. I n s t r u m e n t l e v e l
Set the INPUT LEVEL switch @ s o as
to match the level of the instrument
being used. Set the output level of the
instrument so that only the green n d i cator Q lhghts when the instrument is
played
( 3 ) .Guitar level
Adjust the output level of the guitar so
that the indicator (D lbghts.
*The GUITAR and INSTRUMENT inputs can be used simultaneously~ in
which case both instruments should
be played at the same time whiie adjusting their outputs so that the red indicator does not light.
Once the input levels have been set,
they should not be changed.
4. Try producing t h e vocoder sound:
I l l Set the BALANCE control @ at
VOCODER and try playing the input instrument, In this condition, no sound is
produced
121 Try speaking or singing into the
microphone w h ~ l eplaying the input instrument, The vocoder will produce the
sound of your volce using the tone
color of the input instrument sound.
5. Set the VOICE CHARACTER
(p.41 and HARMONICS @ (p.4) controls for the desired sound quality.
6. The output level cf the vocoder
sound 1s determined by the OUTPUT
VOLUME control @ a n d by the volume
control of the external amplifier being
used. When operating in the DIRECT
mode, the SVC~350has no direct control over the output volume. (Adjust
using the volume control of the external
am~llfier1.
NAMES AND FUNCTIONS OFTHE CONTROLS
INPUT SECTION
INSTRUMENT Jack 8
For instruments other than guitar. This
inpc~tIS the source of mater~al(sound)
from which the vocoder soiind is made;
therefore, the instrument used should
produce a clear sound whlcli IS r c h in
harmonic. Do not use pec~~liar
sounds
a long attack t m e .
or sounds w ~ t h
When using a synthes~zer, set as
follows:
VCO: Use sawtooth wave, or a pulse
wave with a short duty cycle lminimum).
VCF: Set thecutoff frequency h ~ g h .
ENV: Set ATTACK =O; SUSTAIN = 10
(maximum); RELEASE=2or 3 (DECAY
is not used).
When using a string synthesizer, set
the ENSEMBLEeffect at OFF.
MICROPHONE INPUTS@@
If both inputs are used at the same
time, the phone jack input @will have
priority.
For vocoder inputs, dynarriic microphones will usually work better than
condenser m~crophones.
If the input instrument has a wide
dynamic range, it may prove better to
use the GUITAR INPUT jack 0 1 0 take
advantage of the compressor used in
this circuit.
INSTRUMENT LEVEL INDICATOR 0
GUITAR INPUT Jack @
Use the guitar output level to adjust
the input level to the vocoder.
HARMONICS Control @
This controls the harmonics contained
in the guitar sound. Turning clockwise
brightens the sound.
W e careful not to turn this control too
high because unwanted harmon~cscan
be produced when playing chords.
GUITAR INPUT INDICATOR 8
The red indicator lights when the combined instrument and guitar input levels
are too high if the red indicator lights.
turn down the output level of either or
both of the input instruments.
INSTRUMENT LEVEL Switch @
Set to match the Input instrument being
used.
@Fineadjustment should be made using
the output level controi of the instrument.
VOCODER SECTION
VOICE CHARACTER Controls B)
These controls can be used to alter the
tone quality of the vocoder sounds for
creative work or to help compensate
for a speaker deficiency.
BALAF'CE Control @
Controls the balance between the
vocoder sound and the direct sound
from the microphone input. Fully clockwise produces the vocoder sound only;
fully counterclockw~seproduces the
m~crophonesound. and settlng to the
center produces mixture of both.
VOLUME Control Q)
The output level of the sound produced
by the instrument or guitar when in the
DIRECT mode is determined by the instrument's output level setting and tlie
external amplifier's volume control. For
this reason, when using a foot switch
to change between DIRECT and
VOCODER modes, this VOLUME control Q is needed to balance the vocoder
sound with the DIRECT mode sound.
PHONES AND OUTPUT SECTIONS
HEADPHONE LEVEL Control @
HEADPHONE Jack
@
OUTPUT LEVEL SELECTOR Switch @
Affects only the VOCAL AMP OUTPUTS @ @
VOCAL AMP OUTPUT Jacks@@
GUITAR AMPOUTPUT Jack (D
POWER Srritch @ with pilot.
REMOTE CONTROL SECTlON
HOLD Jack@
For using a pedal switchiRoland DP-2;
sold separately) to hold the vocoder
tone color. When the pedal is depressed, the voice tone color being produced
at that point will be held until the pedal
is relezsed Thts c a r ne used to br:dqe
yaps where the singer takes a biezttl.
as one example of use.
VOCODERlDlRECT Jack @
For using a foot switch [Roland FS-2)
t o switch between the vocoder sound
and the direct sound of the microphone.
.With no connection to this jack, the
VOCQDER mode sound is produced.
REAR PANEL
GND [ground)
For making common ground connections with other equipment.
ENSEMBLE Jeck 8
For remote ONIOFF control of the
vocoder ensemble sound by means of
a foot switch (Roland FS-2 1
*With no connection to this jack, the
vocoder is in the ENSEMBLE mode.
OUTPUT CONNECTIONS
-USING VOCAL AMP ONLY
-USING VOCAL AMP 1 2 ~ONLY
~ )
*USING GUITAR AMP ONLY
7
*USING VOCAL AMP AND GUlTAR
AMP
7
i
b"#T*"IIMY
*USING VOCAL AMP ( 2 ~AND
~ 1
GUITAR AMP
--
In the two drawings at the left. the
vocoder and/or direct microphone
sounds do not appear at the GlJlTAR
OUTPUT lack@
Y L > C I I AMP
L
NOTE:
L
With no connection to the VGCGDER/DIRECT jack. the vocoder will remain in the VOCODER MODE
About the Vocoder
g
In 1939. H.Dudiay announceda band
width compression device for use in
telecommunication
systems
The
present day vocoder is based on the
priciples of this device.
The vocoder requires two inputs: the
carrier input and the program input.
The program input often conslsts of
spoken or sung words which are input
through a microphone. The carrier
usually consists of an instrument input
such asa synthesizer.
The vocoder circuits consist of two
major sections: the analyzing secti0.n
and the synthesizing section. The
analyzing sectton breaks down the program lor voice) input to determ~neits
frequency content at any given instant,
then re-assembles this sound in the
synthesizer section using the carrier lor
instrument1 i n ~ uas
t a basic source of
building material In this way the carrier
or instrument input is continuously
processed so that it seems to speak or
sing the words which appear at the pro
gram input The pitch of thls sound will
be determined by the p ~ t c hof the carrier input
The programor voiceinput is analyzed
by passing i r through a set of filters to
determine what the harmon~ccontent
of the sound is and how it changes as
the sound progresses For example, the
sound "oo" usuallv consists of primarilv
Using the Vocoder
low frequencies while the sound "ee"
usually consists of higher frequencies.
The result of this analysis is a group of
control voltages which are used to control the synthesizer portion of the
vocoder Each of these control voltages
controls the output level of a second
series o f filters. Thls second series of
filters operate o n the carrier input signal. With the sound "ee", then, the
control voltages which represent higher
frequencies will be at a higher level than
ttlose controi voltages representing
lower frequences thus opening partially
or completely those synthesizer section
filters associated with the higher frequencies. By this means, the original
voice sound is reconstructed using the
tone color material from the carrier input. The sound of the instrument used
as the carrier input will seem l o "speak"
or "pronounce" the "ee" sound.
Since the vocoder produces sound by
analyzing the microphone input and
using this analysis to reconstruct the
sound from the carrier input, it becomes obvious that the vocoder cannot
produce sound if either of the two inputs is missing. This means that it becomes very important for the words
spoken or sung into the microphone t o
be well synchronied with the notes or
phrases played on the input tnstrument.
Since the pitch of the vocoder output
is determined by the instrument input
rather than the voice input, it is possible
to use pitch related effects such as
vibrate and pitch bend to enhance the
sound.
If the vocoder output sound is combined with the direct sound [BALANCE
Control (D near center), it is possible to
produce duet effects by singing pitches
which are different from those being
played on the input instrument.
BLOCK DIAGRAM
e Rack Mounting the
SVC-350
the SVC-350 can be mounted in a
standard 19" rack usng 5mm screws
as shown in the draw~ng.
5mm screw
19" RACK
SPECIFICATIONS
ROLAND VOCOOER Model SVC-350
INPUTS
OUTPUTS
M I C INPUT: 114 Inch STANDARD
Phone Jack or EIA-RS297
Connector 16000. -54dBm mln.1
For GUITAR AMPLIFIER:114 inch
STANDARD Phone Jack 15kll)
INSTRUMENT
INPUT: 114 Inch
STANDARD Phone Jack 1100kn. 0
dB rnax I
GUITAR INPUT: 1/4 mch STANDARD
Phone Jack 1100kll. GUITAR Low
LEVEL)
INSTRUMENT LEVEL SELECTOR
S w i t c h (OdBm, - 15dBm, -30dBm)
INPUT LEVEL INDICATORS:
LED DISPLAY
5
MIC LEVEL;
Green, Redlover
INSTRUMENT LEVEL, Green Red/
over
GUITAR LEVEL.
Green Red:over
MONO or STEREO OUTPUTS: 114
inch STANDARD Phone Jack
MONO or STEREO OUTPUT LEVEL
SELECTOR Switch LH, M . Ll
DIRECTIVOCODER: 114 inch STAND
ARD Phone Jack for PEDAL Switch
HOLD ONIOFF: 114 inch STANDARD
Phone Jack for PEDAL Swtich
PHONES VOLUME CONTROL
PHONES OUTPUT: 114 inch Stereo
Phone Jack
CONTROLS
M I C LEVEL CONTROL i-54dB
-14d.B)
ENSEMBLE ONIOFF:
114
Inch
STANDARD Phone Jack for PEDAL
Switch
to
MECHANICAL DETAILS
2U EIA STANDARD RACK MOUNT
TYPE
POWER Swtch/lNDICATOR
POWER CONSUMPTION: 8 W
GUITAR HARMONICS CONTROL
DIMENSIONS: 482iWlx92iHI x350iDimrn
19!W) x 3Xi1-11 x 137:,iDifn
11 ELEMENT VOICE CHARACTER
CONTROL
WEIGHT: 14kp/ 301b 1402
VOCODER VOLUME CONTROL
Accessories: Foot Swtch FS~2
VOCODERIDIRECT M I C BALANCE
CONTROL
S~jec~fications
are subject to change
wthout notice
OPTIONS
FOOT PEDAL DP-2
HEAD PHONE RH-10
FOOT SWITCH FS-1
FOOT SWITCH FS-3
MICROPHONE OR-221
A-.
I
. _
-.-
i
MIC. STAND ST-100
SVC-350 OWNER'S MANUAL '84 APR E-2
Roland Corporation