M800 Synthesizer Eurorack Modul

M800 – Virtual Analog [VA] multitimbral polyphonic synthesizer in the Eurorack format. Multitimbral with four Parts. The synth-engine has 12 Voices on the end of the signal path every part has your own stackable effect section ( DELAY, REVERB, CHORUS, EQUALIZER ...).

Four independend Arpeggiator und Step/Trigger Sequenzer may play one of the four Synth parts. The Trigger Sequenzer may trigger the built in transient sample player (Drum Kit .wav) or send trigger to the MIDI-Out.

Diameter: Heigth 3 HE (128,5mm), 32 TE (162,56mm) Wide, ~50mm Deepth

System Specifications:

Raspberry PI3 based (4 core 1,2Ghz)
TFT 800x480 Pixel + kapacitive Touch
Audio Codec: “Wolfson":24 bits, Sample rate 44100Khz
Audio Input: 2 x 3,5mm Jack (Mono)
Audio Output 2 x 3,5 mm Jack (Mono)
Midi: In/out über 3,5mm Jack (Stereo)
Clock Trigger input: 3,5 mm Jack (Mono)

Synthesizer Block Diagram

Spalte

VOICE Struktur:

The Voice consists of two aliasing free

classic waveform oscillators

(OSC1,OSC2)

The sum of those OSC1 & OSC2 will

forward to the multimode filter (FILTER)

with a 12/24db. After the multimode filter (FILTER) the signal is passed through

the 1^st amplifier (AMP1).

The aliasing free wavetable oscillator (WT3) has up to 6 possible instances that

can be detuned in between. Wavetable oscillator (WT3) may alternate sum to

OSC1/2 and follows the classic structure of a subtractive synthesizer or route

through the 2^nd amplifier (AMP2) as a secondary path beside the normal structure. The wavetable position, the FILTER and the AMP1 & AMP2 can be controlled with independent ENVs or LFOs. This gives the sound additional overtone harmonics

and motion.

.

Classic Waveform Oscillator:

This oscillator generates classic waveforms which are typical in the analog synthesizer world. For sure the oscillator is bandlimited (min blip) and do not generate aliasing effects. The OSC1 may hard sync OSC2. This combination makes the oscillator sound like a real analog oscillator.

Multimode Filter:

The MULTIMODE FILTER emulates some classical analog filter types such as filters with 12db or 24db filter depth LP,BP,HP,NS.

Some filter types start self-oscillating on high

resonance values.

The actual cutoff frequency will be displayed by the cursor in real time. The graphical view displays the filter curve in context with the selected filter type, filter mode and their individual parameters.

Spalte

Wavetable Oscillator:

The wavetables are stored in the file system and can be updated. Should one or more wavetables have less than 256 waveforms, they will automatically expand to 256 waveforms, with the help of a linear

interpolation algorithm.

Arpeggiator & Step Sequencer:

The build in Arpeggiator mode has a range up to 64 steps. The ASSIGN window includes K1-K5 which represent the played key at the selected step in the pitch order or the pressed order. The Arpeggiators melody can be changed in real time by pressing other keys. The MODE window includes the settings: “off, on, legato” and specifies if the note should play or hold. In addition, the Arpeggiator is able to act as a Step Sequencer. Within the Sequencer mode each tone at each step can be shifted in semitones or octaves. If a key on the keyboard is pressed the sequence is shifted in relation to the fundamental tone.

Effect Section:

The Effect Section exists for ever part (A,B,C,D) independendly. The Effect Section may be stacked and assigned in order.

(DELAY, CHORUS-FLANGER, EQ, COMPRESSOR, REVERB ...)

and more ...

Module Expansion Bus (Control Moduls)

The Module Expansion Bus allows to connect several, additional control modules on the M800- Synthesizer Main Module. This enables a quick overview and real time change of the parameters to the synth-engine.

M800 Polyphonic Virtual Analog Synthesizer Module