CL-MeltySynth

CL-MeltySynth is a SoundFont MIDI synthesizer library written entirely in Common Lisp. This is a port of the excellent MeltySynth by Sinshu, expanded with new features. There is also my equivalent library for Crystal, Haematite

My midi123 was written in Common Lisp and used CL-MeltySynth in versions prior to v2.0.

Source Code Repository

Example Videos

Warcraft 2’s “Human 1” by Glenn Stafford Rise of The Triad’s “Spray” by Lee Jackson (CL-MeltySynth v2.0.0) Doom E1M1 “At Doom’s Gate” by Bobby Prince (CL-MeltySynth v1.0.0)

Features

• Wave synthesis and Sound
  • [x] 64-bit internal audio engine
  • [x] Choice of linear or cubic interpolation
  • [x] Loads SoundFont files
  • [x] Waveform and Envelope generators
  • [x] Low-pass filter
  • [x] Vibrato and Modulation LFOs
• MIDI processing
  • [x] Note on/off
  • [x] Bank/patch selection with optional remapping (remaps unknown presets to bank 0/128)
  • [x] Modulation
  • [x] Volume control and Panning
  • [x] Expression
  • [x] Hold pedal
  • [x] Pitch bend
  • [x] Tuning
  • [x] NRPN support
• Effects
  • [x] Multiple reverb choices, including a port of Zita-Rev1, with controllable parameters
  • [x] Chorus effect
  • [x] Stereo enhancer effect
  • [x] Reverb, Chorus, and Stereo Enhancer can all be enabled/disabled individually
• Other things
  • [x] Standard MIDI file support
  • [x] RIFF-based MIDI file support (RMI, only the MIDI data is loaded)
  • [x] Loop extension support
  • [x] Performance optimizations