Gamechanger Plasma Voice User guide

PLASMA VOICE

USER MANUAL

The PLASMA Voice is a monophonic Eurorack synthesizer module that produces sounds by
controlling high-voltage electrical discharges between two electrodes in a custom

xenon-lled gas tube. These discharges are converted to analog audio signal using a
specially designed rectier circuit. The result is a diverse range of electrifying tones that
vividly capture the character and intensity of a vibrant blue electrical arc.

The electric discharges are driven by a proprietary ultrasound pulse-width oscillator. This
oscillator is modulated by predened samples and envelope shapes (or SOUNDS for

simplicity's sake) that you can select, trigger, waveshape and modulate with sliders and CV

inputs. This in turn puts you in full control of the electrical discharges and the resulting
sounds.

The PLASMA Voice's selection of built-in SOUNDS is organized into BANKS dedicated to
specic musical parts. However you can transform each one of them far beyond their
intended use by adjusting the parameter sliders that offer deep control over the PLASMA
engine. We invite you to explore the sonic possibilities both wonderful and strange.

Version 1.0, October 2023

LED ROWS & ENCODER

Two 7:7 LED indicator rows
controlled by the ENCODER.

Push to switch rows,

turn to select values 1-7.

The PLASMA tube's driver is controlled by a sophisticated

digital engine. This engine consists of multiple one-shot

and looping samples, as well as several envelopes that

modulate both the samples and the tube driver itself.

Each SOUND denes these internal modulation paths to

Top row: BANK select 1-7
Bottom row: SOUND select 1-7

ALT top row: octave 1-7
ALT bottom row: master CV input
attenuation 1 (full) - 7 (none)

1BASS 2LEAD 3PLUCK 4DRUM 5ME TAL 6STATIC 7SPARK

The SLIDERS allow you to modify each SOUND, often

The ENCODER and LED rows are
also used to browse SETTINGS.

ALT B U TTON

Hold ALT for the ENCODER and
SLIDER alternative functions.

PITCH SLIDER

Center indented pitch control,

+/- 1 octave

0V pitch CV at center indent

produces note C

(adjustable in SETTINGS).

ALT: Fine tune, +/- 1 semitone

TIME SLIDER

Each SOUND has a unique
envelope shape. The TIME slider
time-stretches it. Center indent

produces the optimal time

based on the selected SOUND.

The TIME slider also affects
the FILTER decay envelope time.

The envelope behavior is
dependent on the selected

TRIGGER and ACCENT modes.

ALT: ACCENT envelope time

1V/OCT PITCH CV INPUT +/- 10V

TRIG INPUT & TRIGGER BUTTON

Main trigger / gate input
Rising edge detection & min 2V

Multiple TRIGGER & GATE modes:

1TRIGGER, 2GATE, 3LOOP,
4OSCILLATE, 5ON/OFF

ACC INPUT

ACCENT trigger / gate input
Rising edge detection & min 2V

Multiple ACCENT modes are available:

1ACC E NT, 2DUCK, 3STARVE, 4CVFREEZE,
5J UM P, 6REVERSE, 7BURST

ACCENT is also controlled by ALT+ACC TIME,

ALT+A CC LVL & ALT+ACC SHAPE sliders.

MULTICV INPUT

Assignable CV input, +/- 5V
Default assignment to
BANK & SOUND selection

Alternatively, MULTICV can be assigned as
an additional CV input to any of the 6 SLIDERS.

ALT+MULTICV slider works as an attenuverter

achieve the desired musical effect.

The SOUNDS are organized in BANKS:

transforming it beyond the intended use

dened by the BANK.

AUDIO

OUTPUT

MIDI INPUT

Full MIDI control:
Notes, velocity, CC, PC, SysEx.
CH10 percussion key map.
Included DIN5 / 3.5mm adapter.

CLUTCH BUTTON

The CLUTCH button acts as a

temporary parameter editing

buffer for creating timed and sharp

parameter transitions, including

BANK & SOUND selection,

SLIDERS, ATTENUVERTERS,

ALT and SETTINGS functions.

Press and hold CLUTCH to delay all

real-time parameter changes and

apply them by releasing CLUTCH

DRIVE & EQ KNOBS

Soft-clipping and tilt EQ section

between the TUBE and FILTER.

DRIVE: max CCW for unity gain.

BASS & TREB: cut/boost,

center indent for at response.

CV ATTENUVERTERS

Each one corresponds to

the CV input below the SLIDER.

Center: complete attenuation

Max CW: no attenuation

Max CCW: inverted

FILTER SLIDER

FILTER cutoff frequency and

FILTER envelope control.

Center indent: fully open FILTER

Down: close the FILTER

Up: close the FILTER and

add decay envelope

based on the TIME slider setting.

See SETTINGS to switch

between low pass / high pass.

ALT: RESONANCE amount 0-1

MOD, HARM & FLUX SLIDERS

The digital engine that controls

the TUBE driver consists of
complex modulation paths.

For each SOUND thethree most

useful modulations are

assigned to the MOD, HARM &

FLUX sliders based on the

musical effect.

The center indented position

for the suggested starting

sound.

MOD slider:

pitch-mod type effect depth

ALT: ACCENT LEVEL 0 - 2x

HARM slider:

harmonic content effect depth

ALT: ACCENT SHAPE

FLUX slider:

chaos artifact effect depth

ALT: MULTICV ATTENUVERTER

+/- 1

CV INPUTS FOR

TIME, MOD, HARM, FLUX & FILTER

+/- 5V from center indent

SPECS

Width: 16HP

Depth: 35mm

+12V: 220 mA

-12V: 35 mA
+5V: 0

Output: +/-8V max

Press TRIGGER and CLUTCH at the same time to enter the
SETTINGS mode (indicated by blinking ALT button and LED rows).

To exit press ALT.

+ =

SE TTIN GS

Use the ENCODER to navigate the SETTINGS menu as indicated by
the LED rows. Push the ENCODER to switch rows and turn the
ENCODER to select values 1-7. The top row indicates the selected
parameter and the bottom row indicates the parameter value.

TRIGGER INPUT MODES

There are 5 different main TRIG button and input functionality options.
2 of them have different responses to trigger and gate signals.

TRIGGER RESPONSE GATE RESPONSE GATE ENVELOPE

1:1 TRIG

Triggers samples and envelopes on rising edge

1:2 GATE

1:3 LOOP

1:4 OSC

Triggers samples and
envelopes on rising edge

Triggers samples and
envelopes on rising edge

Always ON mode. Envelopes hold in sustain point
Re-trigger samples and envelopes on rising edge

Gate on: triggers samples and

envelopes and holds in sustain point

Gate off: starts release

Loops samples and envelopes.

Loop length dependent on TIME
slider

SE TTIN G

VALUE

1:5 ON/OFF

Rising edge toggles between ON/OFF modes

While ON envelopes are latched in sustain

ACCENT MODES

There are 7 different ACCENT input functionality modes. Each of them has different parameters mapped to
the ALT SLIDER functions and almost all of them have different responses to trigger and gate signals

TRIGGER RESPONSE GATE RESPONSE ACC TIME SLIDER ACC LVL SLIDER ACC SHAPE SLIDER

2:1 ACCENT

2:2 DUCK

2:3 STARVE

2:4 CV FREEZE

Sample and envelope A LT parameters.

Trigger s
output and tube driver
ducking envelope

Triggers plasma tube
driver ducking
envelope

Samples all CV inputs

and releases (slews)

Gate on: ducks and holds
Gate off: starts ducking

release

Gate on: ducks and holds
Gate off: starts ducking

release

Gate on: samples and holds

all CV inputs

Gate off: releases (slews)

Envelope time

modier

0.25x - 2x

Ducking

release time

Starve
release time

Release time Sample scale

Envelope

depth modier
0 - 1x

Ducking depth Ducking release

Starve depth Starve release

0x - 1x

Envelope shape

modier

-1 = log +1 = exp

shape

-1 = log +1 = exp

stutter

Release slope
Min-hold w/o release

-1 = log +1 = exp

2:5 JUMP

2:6 REVERSE

2:7 BURST

Triggers pitch
modulation envelope

Reverses and triggers

samples and
envelopes

Triggers repeating
trigger burst

Gate on: Triggers and holds

pitch jump

Gate off: starts release

Gate on: reverses and triggers

envelopes and holds in sustain

point. Gate off: starts release

Gate on: continuous repeated

triggers

Gate off: trigger burst decay

Release time Interval

MAX = oct up
MIN= oct down

Reverse

sample and
envelope time

Time between
triggers
repeats

Tube driver
envelope
start position

Output level

decay during
burst

Pitch jump shape

-1 = log +1 = exp

Output envelope

start position

Repeat count

MULTICV INPUT ASSIGN

The MULTICV input can be assigned to any of the SLIDERS as an additional summed CV input
or to SOUND / BANK selection. In case of SOUND/BANK selection incoming CV scans through SOUNDS spanning all BANKS.
SOUND selection is quantized to the major scale - each white key corresponds to one SOUND, 1V input corresponds to 1 BANK.

ALT + FLUX / MULTICV SLIDER is used as an attenuverter for MULTICV.

3:1 3:2 3:3 3:4 3:5 3:6 3:7

1V/OCT CV TIME CV MOD CV

HARM CV FLUX CV FILTER CV

BANK & SOUND

MIDI INPUT CHANNEL SELECT

Selectable MIDI channel for receiving notes, velocity, pitch & mod wheels, PC, CC and SysEx.
Regardless of the selected MIDI CHANNEL the module accepts General Percussion Key Map on Channel 10.

CH 1 CH 2 CH 3 CH4 CH 5 CH 6 CH 7

CENTER NOTE TUNE

Selectable note for 0V PITCH CV input and TUNE slider in center indent position.
Primarily used for aligning with the base pitch of chosen CV sequencer / controller.
Note: 12 values instead of the usual 7.

C# D#

C D E

F G A

F# G# A#

B

MASTER OCTAVE OFFSET

Selectable octave offset summed with the regular OCTAVE setting, PITCH SLIDER and PITCH CV.

-3 -2 -1 0 +1 +2 +3

FILTER MODE SELECT

Selectable master FILTER mode and FILTER SLIDER bahavior.
This parameter overrides the FILTER type built in each SOUND.

FILTER TYPE SLIDER center indent SLIDER downward SLIDER upward

7:1 DEFAULT

Dened by the selected SOUND

7:2 LP

7:3 HP

7:4 LP / HP

Low pass Open FILTER

(Max cutoff
frequency)

High pass Open FILTER

(Min cutoff
frequency)

Low pass / high pass
(DJ style)

Open FILTER
(Max low pass and
min high pass cutoff
frequencies)

Close FILTER
(Reduce cutoff
frequency)

Close FILTER
(Increase cutoff
frequency)

Close high pass

FILT ER

Close FILTER and add
Decay envelope

modulation

Close FILTER and add
Decay envelope

modulation

Close low pass

FILT ER

PLASMA Voice is fully MIDI controllable. See SETTINGS for channel selection. Use the included 3.5mm to DIN5 adapter.

MIDI NOTES

MIDI CH Note ID Function

Selected

CH 1 - 7

7 - 137
(G-2 - G8)

Plays note at MIDI note pitch, responds to
velocity. PITCH SLIDER, PITCH CV, OCTAVE
and MASTER OCTAVE all offset the MIDI note

Selected

CH 1 - 7

0 - 6
(C-2 - F#-2)

Temporarily changes ACCENT mode (1 - 7)
and triggers ACCENT

& CH 10

CH 10

35 - 83
(B0 - B4)

General MIDI Percussion
SOUNDS 1 - 49 mapped to notes 35 - 83.
Responds to velocity

MIDI CC MAP

CC messages received on the selected CH 1 - 7 and CH 10.
The listed CC messages are MSB. LSB messages are

CC

1

8

9

PARAMETER

MODWHEEL

PITCH slider

TIME slider

MSB VALUES

0-127 = MIN - MAX

MIDI PC MAP

PC Messages are received on

the selected CH 1 - 7 and CH 10

PC

Message

1 - 49

61 - 65

71 - 77

81 - 87

91 - 102

111 - 117

121 - 124

WARNING!

NEVER operate the PLASMA VOICE near water or on outdoor stages in
rainy conditions. DO NOT play your PLASMA VOICE in the shower!

The XENON Tube contained within the PLASMA VOICE will run an estimat­ed 10 000 hours - In case of a broken tube or a faulty unit, please contact
your PLASMA VOICE dealer or [e-mail]. For all other
inquiries, please reach out to Gamechanger Audio.

Gamechanger Audio will not be liable for any injury, material damage, or
any other loss, caused by the incorrect operation of PLASMA VOICE, or
breach of the warnings and instructions laid out in this manual.

Function

Select SOUNDS 1 - 49

Select TRIGGER mode 1 - 5

Select ACCENT mode 1 - 7

Select MULTICV assignment 1- 7

Select CENTER NOTE C - B

Select MASTER OCTAVE OFFSET +/-3

Select FILTER mode 1 - 4

10

MOD slider

11

HARM slider

12

FLUX slider

13

FILTER slider

14

TIME CV Attenuverter

15

MOD CV Attenuverter

16

HARM CV Attenuverter

17

FLUX CV Attenuverter

18

FILTER CV Attenuverter

19

FINE TUNE cents

20

ACCENT TIME

21

ACCENT LEVEL

22

ACCENT SHAPE

23

MULTICV Attenuverter

24

FILTER RESONANCE

FOR EUROPE:
This product complies with the requirements of Electromagnetic
Compatibilit y Directive 2 014 / 30 / EU.

FOR CANADA:
NOTICE: This clas s B digital app aratus meets all requirem ents of the
Canadian Interference-Causing Equipment Regulations.
AVIS: cet appar eil numérique de la cla sse B respecte tout les exigenc es du
règlement sur le matér iel brouil leur du Can ada.

MANUFACTURER ADDRESS:
GAMECHANGER AUDIO
TOMSONA STREET 33A-32
RIGA, LV-1013

LATVIA

[e-mail]
WWW.GAMECHANGERAUDIO.COM
[phone]

0-64

MIN - CENTER

65 - 127

CENTER - MAX

0-127 = MIN - MAX

WARRANTY & RETURNS

You have a 30 day return period when you may return the product and
receive a full refund. You will only be responsible for return shipping
charges.

Each PLASMA Voice manufactured by Gamechanger Audio is warranted
to be free from defects in materials and workmanship for one year from
the date of shipping or longer if required by the relevant legislation. This
warranty shall not apply to any unit which in the opinion of the
manufacturer has been used improperly or has been mechanically or

otherwise damaged by accident, misuse or negligence or has been

altered or repaired in such a way to impair performance, nor shall it apply
to cosmetic defects (considered normal wear and tear).

Other parts, such as knobs, rubbers, cable connectors, are non
replaceable. The manufacturer reserves the right to make changes in
design or construction of this equipment without obligation to install
similar changes in equipment already sold.

FOR THE US:
This equipment has been tested and found to com ply with the limits for a class B
digital devic e, pursuant to part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with these instru ctions, may
cause harmful interference to rad io com munications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determin ed by turni ng the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following mea sures:

- reorient or relocate th e receiving antenna.

- Increase the separation between the equipm ent and receiver.

- connect equipment into an outlet or a circ uit different from that to which the
receiver is conne cted.

- consult the dealer or an exper ienced radio / TV technician for help.

This device complies with pa rt 15 of th e FCC rules. Op eration is subject to the
following t wo conditions: (1) this device may not cau se harmfu l interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
Unau thorized changes or modications to the system can void the use r’s Auth ority
to operate this equipment. This equipment requires shielded interface cables in
order to meet FCC Cla ss B limit.