whysynth 20090403-1.2build1 (amd64 binary) in ubuntu focal

 Disposable Soft Synth Interface (DSSI). A brief list of features:
   - 4 oscillators, 2 filters, 3 LFOs, and 5 envelope generators per voice.
   - 10 oscillator modes minBLEP, wavecycle, asynchronous granular, three
     FM modes, waveshaper, noise, PADsynth, and phase distortion.
   - 6 filter modes.
   - flexible modulation and mixdown options.
 DSSI is a plugin API for software instruments (soft synths) with user
 interfaces, permitting them to be hosted in-process by audio applications.
 More information on DSSI can be found at: http://dssi.sourceforge.net/