PreenFM2 Digital FM Multitimbral Synthesizer

This USED and fully assembled PreenFM2 is 100% functional and in good condition with a chip at the lower right hand corner.  Power supply included.

The PreenFM2 brings the old FM synthesis in a small open-source modern DIY box.

In addition to regular FM synth features you’ll get (Firmware 2.01) :

• 4 independent instruments. Each of them has:
• Powerful arpeggiator (Mutable-Instruments opensource algorithm).
• 1 effect Slot (LP, HP, Bass boost, Band Pass, crusher)
• 1 gate effect
• 4 rapid access performance parameters
• The 4 instruments can be saved all at the same time in combo presets.
• Each instrument has its own modifiable midi channel. They can share the same for FAT quadruple timbres notes.
• Modifiable number of allocated voices… Between 1 and 14.
• 28 FM algorithms from 3 to 6 operators
• Up to 14 voices of polyphony (8 if you use 6 op algorithms). Each voices has:
• 7 low frequency modulators (3 LFOs, 2 enveloppes, 2 step sequencers).
• 12 rows matrix : 16 sources, 32 destination (LP, HP, gate, stereo, MI, attack…)
• Arpeggiator, LFOs and step sequencers synchronizable on external midi clock or internal clock.

Operator features:

• 7 builtin waveforms + 6 user waveforms read from the usb drive.
• Stereo panning (at the carrier operator level)
• 8 envelope parameters per operator (DX7 like)
• Direct Scala scale file loading for microtonality. Up to 128 Scala scales selectable from the preenfm2.
• Modular Randomizer
• USB all the way
• Midi over USB
• USB drive: huge preset banks: 64*128 presets, 8*128 combos, 256*32 DX7 presets.
• The USB drive holds your preset banks, you scala scale files, your user waveform files.
• Easy firmware upload and flash.
• USB powered
• Comprehensive user interface and associated to a 4×20 characters display for easy preset edition
• Small, portable and easy to build (no SMD)
• Mac/Linux/Windows open-source preset Editor

Other features :

• Can import DX7 sysex banks (just put them on the usb stick)
• Glide possible for instrument(s) with number of voice set to 1
• Midi through Din5 or USB
• Can be powered by USB or 7.5V-9v 2.1mm DC IN
• Boots in 2 seconds
• Al very standard components
• 2 * double 12bits DAC (mcp4922) => 18 bits stereo output
• Single simple pot to control stereo volume
• Sample rate 38Khz (or 42Khz with overclocked firmware)
• Custom bootloader with 3 ways to upgrade firwmare: Usb stick, sysex through Din5 or DFU.