polynominal logo
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME

Access Virus A




Access virus A

info Country: Germany
Weight: 1,5 kg
Dimensions: 380 (w) x 250 (h) x 73 (d) mm
audio demo trend price : 300€
manual   factory patch demo video comments

Advanced simulated analog synthesizer

The first of the famous VIRUS synthesizers family started at the end of the nineties.

virus A technical info
full of knobs!

info MODULE with optional rackmount ears.
The main panel features a 2 x 16 lines display, 27 buttons and 32 knobs with relative or absolute position mode.

Back panel terminal connectors:
- 3 stereo signal outputs
- 1 stereo or 2 independent mono inputs
- Midi IN and OUT that can be also switched to THRU mode
- headphones using first left main out.

acPower supply external PSU 12 VDC 1A - (+ polarity.



edit VOICE
Siemens SAB80C535 with physical-modeling DSP core generates 12 voices polyphony at 20 bit resolution.

virus A technical info

VIRUS A: the synthesis is a mix of virtual analog modeling and short PCM waveforms - these are the Harmonic Waveshapes.

demo HEAR all waveforms

A VIRUS voice is composed by 2 oscillators + 1 sub-oscillator + 1 noise source.

Modeling waveforms sin / tri sin / tri sqr / tri
Pulse width yes yes -
Smooth shaper yes yes -
PCM waveshapes 64 64 -
Volume bal osc1/2 bal osc1/2 yes
Pitch tuning yes yes -
Wave sync - 1>2 -
FM - 1>2 -
virus A technical info

PERFORMANCE system handles 16 multitimbric parts with individual settings:

- velocity assign to FM, pan, shape and width
- variable portamento time
- 4 mono playmodes
- 2 voices stack (with detune)
- Midi channel assign
- key zone assign
- note transpose
- pitch detune
- assign analog out / volume
- note priority
- FX amount

demo unison mode

virus a


filterFILTER 2 filters (-12 dB each) can be combined in 2 serial, 1 parallel or directly set to independent mode. Both filters feature 4 different models:

virus filter

- lowpass
- highpass
- bandpass
- bandstop
In addition a special Keyfollower option plus a filter saturation which basically emulates a vacuum tube distortion.

demo filter test


adsr ENVELOPE 2 EGs:

EG - EG1 AMP: 4 segments + 1 time
- EG2 filter: 4 segments + 1 time with possible EG inversion.


lfo LFO
up to 3 delayed modulators:

demo all LFO LFO 1 LFO 2 LFO 3
Shape: sin / tri /saw / sqr / S&H / sample & glide sin / tri /saw / sqr / S&H / sample & glide sin / tri /saw / sqr / S&H / sample & glide
EG mode: yes yes no
Symmetry: yes yes no
Destinations: pitch / width / resonance / filter gain osc shape/ Fm amount / cutoff / pan pitch /width

MATRIX like a modular, the Virus handles 3 internal routings or virtual patchcords that connect a modulation source to a destination:

Sources: Destinations
mod wheel
MIDI cc#
data slider
hold pedal
sustain pedal
portamento pedal
osc shape
LFO rate, symmetry
effects control

there are 2 digital FX onboard:
- delay: with rate, time, modulation LFO and feedback.
- chorus: with rate, depth, delay, feedback and LFO shape demo HEAR chorus


midi ARPEGGIATOR simple function with latch and 4 directions: up / down / up-downd / as played. Virus arpeggiator and LFO1-LFO2 can be sync internally from 63 to 190 BPM (there are 17 time dividers) or slaved to external Midi clockdemoHEAR arpeggiator


midiMIDI full Control Change implementation + full exclusive systems
TIP: there are 2 freely assignable knobs to any Midi CC#.

memroy MEMORY
CMOS ram UM621024C:
- 256 RAM single
- 128 RAM multi.

access virus a

- LEFT Battery replacement-

Memory works with a lithium 3V battery in a dedicated holder


- click to enlarge picture -

my model always had trouble with random values, finally found out a non-soldered resistance (from factory?) probably I had bad luck, now it is perfect (check out pic).

access virus a


(thanks to TOPOPICCIONE for great pic ;)

- click to enlarge picture -


VIRUS B video VIRUS B KBvideo
VIRUS B rack VIRUS B indigovideo
VIRUS B module (1999) 24 voices 3 oscillators, 3 LFO. Updated as VIRUS CLASSIC

VIRUS B KB keyboard (2000) 24 voices keyboard version B

VIRUS B rack 16 voices, 2 oscillators

VIRUS B indigo 24 voices, compact 37 keys version

VIRUS Cvideo

virus indigo2video

virus C xl virus TI keybaordvideo
VIRUS C (2002) module 32 voices. keyboard version VCKB

VIRUS C INDIGO2 REDBACK 37 keyboard version

VIRUS C XL Rackmount version

VIRUS TI (2005) 80 voices, replaced by faster TI2

ti desktopvideo virus ti polarvideo VIRUS TI snowvideo  
VIRUS TI DESKTOP Same as TI keyboard VIRUS TI polar compact- DARKSTAR is a black version VIRUS TI snow (2008) cut-down version, 50 voices  




demo Factory demo
demo Favourite: bass metal
demo Favourite: waveforms
demo Favourite: pan virus
demo Favourite: slow pad
demo Favourite: bad robot
demo Favourite: comm (+drums)
demo Favourite: pad reverse
demo Favourite: formant pad
demo Favourite: digital noises
demo Favourite: attack synth
demo Favourite: quite FM!
demo Piano: rhodes
demo Organ: hammond
demo Bass: analog
demo Bass: famous line
demo Bass: yelloscreen
demo Pad: dark ambient
demo Pad: lush
demo Pad: sadness
demo Pad: worry
demo Synth: 4 bits
demo Synth: acid
demo Synth: arpeggiated
demo Synth: bent
demo Synth: coldwave
demo Synth: distorted Tb
demo Synth: elastic Tb
demo Synth: harsh
demo Synth: morph
demo Synth: performance (+ samp)
demo Synth: quick fast
demo Synth: round ball
demo Synth: silky
demo Synth: speedchange
demo Synth: square
demo Synth: square arp
demo Synth: another tb
demo Synth: trance like
demo FX: Hell
demo FX: metal percussion
demo FX: padfx
demo FX: percussive
demo FX: ringmodulatorfx
demo FX: scanwave
demo FX: sequenced
demo TEST: all waveforms
demo TEST: all suboscillators
demo TEST: analog boost
demo TEST: stack unison
demo TEST: sync OSC
demo TEST: ringmodulator
demo TEST: all LFO shapes
demo TEST: chorus modes
demo TEST: delay modes
demo TEST: vocoder 1
demo TEST: vocoder 2


Access Virus A sequensed original demo acid virus
Access Virus A sequencer original demo FUN :)

Company: Access
Model: VIRUS A
Class: Synth Module
Dates: 1997
Display: 2 x 16 lines LCD
Synthesis: Virtual Analog
Polyphony: 12 voices
Multitimbric: 16 parts
Resolution: 20 bits
Oscillator: 2 digital OSC
Suboscillator: yes
Filter: BPF / HPF / BPF / BEF
Envelope: 2 EGs
LFO: 3 modulators
Effects: delay + chorus
Memory: 256 RAM slots
Arpeggiator: yes
Sync: Midi
Midi: IN / OUT / THRU
Demo: 70


zoom picture



- Free sample set



access virus cat

fxfx synth cat


VIRUS A for sale

access virus A for sale






virua a lateral view middle virus lfo


solid solid
Bang for the Buck Classic Digital

REVIEW "Good sound , great wavetable and weird multimode filter, still a precious machine!"

manual manual
- Good sound -polyphony
-solid built
- not so easy to understand
-now cheap -manual

"Those massive analog beasts certainly had a stunning visual effect, especially on stage. However, we will guarantee that you will change your mind ..." VIRUS manual

Add Comment or Review


polynominal logo
      For sale Comment Contact
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME

all snapshots, sounds, texts copyright Polynominal.com / Eric Pochesci polynominal.com is not associated or affiliated with ACCESS in any manner.

Access Virus A Access Virus A Module
71 out of 100 based on 1 user ratings
250 to 350 from 1 sellers Sellers: