MD900   is a polyphonic desktop synthesizer, multitimbral with 4 parts. A polyphony of up to 16 voices are shared by the 4 multi-timbral parts. All of these 4 parts have their own effect stack [Mod-Delay (flanger, chorus, vibrato), Reverb, Tube-AMP, EQ, LP-Filter, DYNAMIC (Limiter) , Stereo Delay ...].

The overall audio path is stereo. Rationally, the oscillator, mixer filter, amps and effects are all in stereo.

Four independent arpeggiator und step sequenzer assigned to each of the four synth parts. The trigger sequencer may trigger the built in transient sample player (Drum Kit .wav) or send triggers to MIDI-Out (USB-DIN or USB-MIDI)

The housing is made of aluminum with real walnut wood on the front and back.

All components are industrial grade. On the operator panel we use precision potentiometer with aluminum covered knobs.

For some parameter entries we use endless encoder without rest.

This kind of encoders feels like a potentiometer.

All of this feels very valuable and it feels great to work with.

 The MD900 XVA engine is patch compatible with the M800-R2 synthesizer.



 460mm x 295mm x 65mm


External 15V DC power brick 50W

Audio In 

6.3mm stereo jack

Audio Out 

Left 6.3mm mono jack, right/left 6.3mm stereo jack


6.3mm stereo jack


1x Midi Input, 1x Midi Output, 1x Midi through

USB 2.0

2x Hot connect for USB/Ethernet, USB-Midi Host 

Pedal SW

1x Pedal switch input 6.3mm jack

volume pedal

1x Standard expression pedal


TFT Dislay

5" 800x 480 Color (24bit) capacitive touch display.


37x Potentiometer, 12x linear slider, 12x endless encoder, 30x switches, 42x Leds


Overview Firmware OS:

We have developed a groundbreaking XVA-Sound Engine for the MD900 synthesizer, revolutionizing the way musicians create and perform. Running on a Linux operating system with real-time extensions, this cutting-edge engine delivers exceptional performance with a boot time of under 30 seconds.

With the MD900, managing your content has never been easier. All your wavetable files, sample files, presets, and sub-presets are conveniently stored on the internal filesystem. What's more, you can easily access and manage these files over Ethernet using a USB-LAN adapter. Seamlessly organize and update your configurations with simplicity and efficiency.

Preinstalled content (by V2.20 update):


241 presets in 14 categories


61 Wave Tables


59 Sample Files

20 Multisample Files


375 sample files in 7 drumkits


6 Demo Arrangements / Clips


43 Demo Midi files

XVA Engine

Synthesizer Structure

 Operation Panel:

 The operation panel gives you real time control to the major voice parameters with a dedicated knob. All parameters are accessible via

 touch-display and the endless rotary encoders. The part (timbre) has to be selected to alter the parameter on the dependent timbre.

 The module specific info display gives the necessary detailed feedback on the parameter changes.

Configuration example:

You may connect classic midi keyboards on the MIDI-IN port (3.5mm Jack) or midi based devices (Drum Computer, Synths ...) on the MIDI-OUT. Over USB you may connect midi controllers as well. In total 4 midi USB devices can be managed by the M800-R2.

With the build in midi device manager you are able to map those USB midi devices to a certain port (4 ports for MIDI Note & CC Events). In the midi settings you may choose that port for which Midi Note-Event or CC should be processed.

With the "midi learn" you may assign the most sound forming parameter to a certain midi device, channel and control.

The internal control bus allows the expansion for additional control modules.