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SKU: Rossum_.Assimil8or Maker: Types: , , , , ,


Multi-Timbral Phase Modulation Sampler (V2.0)

Designed to provide a powerful, flexible sampling engine for modular synthesis, the ASSIMIL8OR Multi-Timbral Phase Modulation Sampler module is the latest incarnation of Dave Rossum’s decades-long pioneering of affordable professional sampling technology.

ASSIMIL8OR provides eight independent channels of sampling with sound quality that can range from extremely hi-fi to low fi, all with extensive real-time CV control.

Key ASSIMIL8OR features will include:

  • Eight-channel multi-timbral operation. Each channel will be available from its own independent output as well as appearing in the stereo mix output.
  • Superb 24-bit A/D and D/A conversion.
  • Mono or stereo sampling. Channels can be configured as eight mono voices, four stereo voices, or any combination. (Well, any combination that adds up to eight).
  • The ability to assign up to 8 samples to each channel and select between them in real time via CV.
  • DC coupling through the signal path for sampling of control voltages.
  • Unique timbral capabilities with the ability to phase modulate samples by external analog signals or by other samples (a first, we believe).
  • Variable sample fidelity with independently selectable sample rate and bit depth.
  • Real-time CV control of bit depth.
  • Real-time CV control of aliasing (from virtually none to lots).
  • Extensive sample manipulation and looping capabilities.
  • Sample scrubbing under CV control.
  • One-shot or gated sample playback with variable attack and release times.
  • Gate/trigger inputs and CV inputs for each sample that can be assigned independently for each channel to virtually any sample parameter. Examples include:Pitch
    Bit Depth
    Phase Modulation
    Sample Start
    Sample Length
    Loop Start
    Loop Length
    Release Time
  • A front panel accessible SD card for sample and preset storage.
  • And a lot more…



2,300 seconds at 48kHz mono, freely allocatable between the 8 channels


48kHZ, 96kHZ, 192kHZ

A/D & D/A

24 Bits


32 Bits


100 microseconds at the Mix Outputs

180 microseconds at the Individual Outputs


Sample L/R

2x 3.5mm mono socket

100kΩ Input Impedance

Gate/Trigger 1-8 

8x 3.5mm mono socket

100kΩ Input Impedance

1.6V threshold

Control Voltage A 1-8

8x 3.5mm mono socket

100kΩ Input Impedance

96 kHz sample rate

Anti-alias filtered to 20kHz bandwidth

Control Voltage B&C 1-8

16x 3.5mm mono socket

100kΩ Input Impedance

48 kHz sample rate

No anti-alias filtering


Mix Outputs L/R

2x 3.5mm mono socket

1kΩ Impedance

Individual Outputs

8x 3.5mm mono socket

1kΩ Impedance


+/-12V via 16-pin, Doepfer-style connector


220mA +12V, 30mA -12V


28HP (W); Panel to power connector (with connector plugged in) 25mm (D)


1x Micro SD card
1x 16-pin, Doepfer-style cable
4x M3 screws
4x M2.5 screws
4x Nylon washers
1x Quickstart Guide

Assimil8or documentation

Assimil8or QuickStart Guide (PDF)

Assimil8or Manual (PDF)

Download the latest Assimil8or software

This is where you’ll find the latest version of Assimil8or software.

NOTE!: The software has been updated since the initial shipment of Assimil8or.

The latest version of Assimil8or software is 1.03_180502 (released May 3, 2018).

This version of software offers a few improvements and squashes a few bugs that came to light after the initial release:

Improved: Increased maximum visible folder count on a card from 128 folders to 1024 folders.
Improved: Hard truncation of a stereo sample now updates next channel’s sample selection if the channel was properly configured for stereo/right.
Fixed: Disappearing cursor on waveform displays with very long samples.
Fixed: Samples that had the ‘#’ character in sample name wouldn’t load.
Fixed: Some samples wouldn’t load due to an odd sized ‘inst’ chunk in the WAV header.
Fixed: Preset 199 didn’t get erased when loading a new folder.

Check your Assimil8or’s Software

To check the version that’s in your Assimil8or, press the UTILITY button to bring up the Utilities screen. Scroll down to About this Module and click the encoder to see the currently installed version.

Update your Assimil8or’s Software

To update your Assimil8or’s software, download the zip archive at the bottom of this page, then:

1. Unzip the archive, copy the “app” file to the root level of your micro SD card, and insert the card into the front panel slot on your Assimil8or.

2. Select Utilities > Load Software and click the encoder.

3. Assuming you inserted your SD card in Step 1, click the encoder as instructed.

4. If all goes well (which it almost certainly will), you will see a success message and instructions to turn the encoder and then click it to reboot your Assimil8or with the new software.

5. If an error is detected during the process, an error message will be displayed and you can try again.

6. Enjoy your new software.

Click here to download Assimil8or software version 1.03_180502 as a zip archive.