○ Legacy product · The MD900 is no longer in active production. Looking for our current synthesizer? See the Vibes MD850 →

MD900 · Predecessor of the Vibes

MD900

The Powerful Desktop Synth.

True stereophonic digital synthesizer with 16 stereo voices. The first production instrument from Mayer EMI — shipping from 2021 to 2024 — and the foundation on which the Vibes MD850 was built.

The Idea

Built for Sound Design.

With its layout and usability optimized for sound design, the MD900 was conceived as the perfect synthesizer for the studio or home setup. Equipped with our XVA Sound Engine, it delivered amazing sounds from clear highs to powerful lows.

Its virtual analog architecture, accompanied by modern digital elements like stereo wavetable oscillators and effects, was extended by additional functionalities like Arpeggiator and a Drum Computer — leaving no wishes unfulfilled.

What Made It Special

Three Things the MD900 Got Right

Stereo in Every Detail

Full stereo oscillators with 4x unison, dual stereo filters, amps, and even LFOs. The architecture and precision of the XVA Engine allowed for an immersive sound experience — earth-shattering basses, deep pads, and crystal-clear stereo leads just a few touches away.

Designed for Musicians

The front panel layout gave immediate access to all the parameters you need. Quick Navigation Buttons displayed the desired function on the touchscreen. The teach-in functionality let you create a new parameter modulation directly from the panel. Sound design at a new level of ease and efficiency.

Quality You Can Feel

Every button, encoder, fader, and display selected with utmost quality and reliability in mind. Aluminium housing with walnut wood front and back. Assembled and checked by hand in our own production in Austria — every synth a joy to unbox.

Specifications

MD900 Specs

Complete technical specifications for the MD900. Preset-compatible with the Vibes MD850.

Engine & Sound

Sound Engine
Based on the XVA Audio Engine · preset compatible with the Vibes
16 shared stereo voices
4 synth parts + 14 drum instruments

Per-Voice Architecture
2x oscillators with two models:
• Algorithm: 8 waveforms (PD_SIN, VA_SWEEP, …) with morphing and modulation
• Wavetable: 50+ preset wavetables, up to 256 single-cycle waveforms with 2048 samples per cycle (Serum format compatible), spectral effects, up to 4x stereo unison
1x sample / noise oscillator with configurable loop modes
2x stereo multimode filter with 10+ models
4x ADSR envelopes · 3x LFOs · 1x Waveform Shaper
Modulation matrix with 24 slots (25 sources, 40 destinations)

Sequencing
Arpeggiator and step sequencer per synth part
7-track clip launcher (4 synth + drums + 2 MIDI)
Polyphonic MIDI sequencer with recording and quantization
Drum pattern and sequence editor
Performance controller support (Launchpad, APCmini) via USB

Effects
4x stereo multi-effect stack (one per synth part)
Reverb, stereo delay (MIDI synced), compressor, JChorus6, and more

Hardware & I/O

Control Elements
5″ capacitive color touchscreen (800×480px)
5 encoders · 37 potentiometers · 12 linear sliders
12 endless encoders · 30 buttons · 42 LEDs

Housing
Size: 460 × 295 × 65 mm
Weight: 4.4 kg
Aluminium chassis with walnut wood front and back

Connectivity
Power switch · Power in 12V DC, 2.5A
3x USB-A port (max. 500mA)
Sustain Pedal in: 6.3mm TR jack
Expression Pedal in: 6.3mm TR jack
DIN MIDI in / through / out
1x Line in: 6.3mm TRS jack (24-bit, 48kHz)
2x mono/stereo line out: 6.3mm TR(S) jack
1x headphone out: 6.3mm TRS jack
Optional: Ethernet via USB-to-Ethernet adapter

MIDI
MIDI control, note on/off, pitchwheel, polyphonic aftertouch
Transport send/receive · clock send/receive

Memory
14 GB internal storage for presets, wavetables, samples, performances, sequences
Web interface for upload/download (via optional USB-to-Ethernet adapter)

Package Contents

MD900 Synthesizer
Power supply 12V DC (with EU, UK, US, AUS plugs)
User manual

Audio Demos

Hear the MD900

Sound Design

Limbic Bits MD900 XVA Sound Demo

Limbic Bits led the sound design of the MD900. This is a small excerpt from the first 150 factory presets — and a thank-you to Limbic Bits for the support, the ideas, and the constructive criticism throughout development.

Performance

MD900 Clip Launcher Demo

A short demonstration of the Clip Launcher and the XVA Sound Engine in the MD900. Using the USB Host interface to connect an APCmini and USB Keyboard for hands-on performance.

The Story

From the MD900 to the Vibes.

The MD900 was our first production instrument — the result of nine years of development, prototypes, and Superbooth feedback. It established the XVA Sound Engine, the panel-driven workflow, and the build quality that defines every Mayer EMI synthesizer to this day.

In 2024, we launched the Vibes MD850 — a more compact format using the same XVA engine, with VibesConnect, expanded oscillator types, and a refined workflow based on three years of customer feedback. Presets created on the MD900 transfer directly to the Vibes.

MD900 owners continue to receive firmware updates and full support. The Vibes is the active product, but the MD900 remains a valued part of our story.

MD900 Support

Still Owning an MD900?

The MD900 is no longer in production, but we continue to support every unit out there. Firmware updates, manuals, and direct contact remain available.

Firmware Updates

Latest firmware, manuals, and quickstart guides for the MD900. Compatible firmware updates continue to be released.

GET FIRMWARE →

Discord Community

Join the Mayer EMI Discord. MD900 owners and Vibes owners share patches, tips, and feedback in the same community.

Join Discord →

Direct Support

Need help with your MD900? Contact us directly. Horst replies personally within 48 hours, no support tiers.

Looking to Buy?

The Vibes MD850 Is Our Current Synthesizer.

Same XVA engine. More compact. Browser-based editing via VibesConnect. Hand-built in Austria, available now.