Features

Currently Implemented

• 96 notes polyphony.
  
• Multitimbral with 4 simultaneous timbres (not quite functional yet).
• 8 oscillators per note.
• Waveforms:
• Sine.
• Square.
• Sawtooth ramping up.
• Sawtooth ramping down.
  
• White noise.
• Pseudo random (sample & hold).
• External left audio input.
  
• External right audio input.
  
• One Amplitude Envelope Generator per oscillator.
• One Frequency Envelope Generator per oscillator.
• Four Levels and Four Rates per Envelope Generator.
  
• 8 modulation depth control parameters for each oscillator (including self-modulation, AKA feedback).
• One output volume control parameter for each oscillator.
• Each oscillator can have a fixed base frequency or track proportionally to the MIDI note.
  
• Two identical analog outputs.
• Stereo DAC (digital to analog converter).
  
• 48kHz sampling rate.
• 24-bit samples.
• Two MIDI in.
• One MIDI out.
• Hardware implementation of the sound generator.
• Firmware implementation of the MIDI protocol.

Planned

• Support of performance controls:
• Note velocity.
• Polyphonic aftertouch.
• Global modulation wheel.
• Global pitch Bend.
• Master volume.
• Patch global volume.
  
• Multitimbral with 8 or 16 simultaneous timbres.
• Presets loading and saving through MIDI sysex.
• Setting of every individual parameter via MIDI sysex.
  
• Stereo S/PDIF output.
• Stereo S/PDIF input.
  
• Stereo analog output.
• Stereo analog input.
• Editing features:
• Copy current EG parameters to all selected oscillators.
  

Under Consideration

• Missing DX7 parameters or features (with improvements).
  
• Oscillator synchronization.
• Per timbre.
• Per Oscillator.
  
• LFO.
• Amplitude modulation.
• Frequency modulation.
• Per timbre.
• Per note.
• EG forced damping / re-starting.
• Global.
  
• Per timbre.
• Per EG.
  
• Waveforms:
• Rectangle with programmable duty cycle.
  
• Rectangle with duty cycle controlled by EG.
• Transition between any two waveform under EG control.
  
• Microtuning including MIDI Microtuning Standard.
• Amplitude modulation between any oscillator pair. (AKA ring modulation.)
• Enhanced EGs.
• More Level/Rate pairs.
• Inverted.
• Starting level.
• Exponential curves.
• Layering of two timbres.
• Keyboard splitting.
• Add random jitter and/or noise to oscillators so that two successive notes are never identical for a more "natural" sound.
  
• Global Effects:
• Reverb / Echo
• Compressor.
• Per Note Effects
  
• Low Pass Filter with resonance and EG frequency control.
• FM of input signal.
• Filtering by processing in the frequency domain.
• USB MIDI interface.
• SD card interface (mostly for presets and microtuning tables).
  

Rejected

• None so far. :-)