This is an old video (hopefully I'll be able to make a new one soon):
The CONCERTO synthesizer is what I intend to be the sound generating side of a music making software for the Commander X16. It uses the 16 voices of the VERA and the 8 voices of the YM2151 and aims to get the very maximum out of them. It is not quite there yet but has a lot of strengths already. The main features:
32 synth timbres (i.e. sounds)
16 monophonic channels, each playing a dynamically assigned synth timbre
up to 4 PSG oscillators and 1 YM2151 voice per timbre
up to 3 envelopes and 1 LFO per timbre
pitch, volume and pulse width modulation
volume control per voice ("velocity")
pitchbend, volume and vibrato automation
save and load presets / banks (a bank is the entirety of all 32 loaded timbres)
comes with one bank of "factory" sounds
The whole sound engine is exposed via an API that can be used by other applications. Concerto also comes with a player.
If you have problems with the audio quality in the "Try it now", download and run in the offline emulator with the command line option "-abufs 12" or more.
To use file loading and saving, you must use an SD card.
For more information, look into the README and the source files and/or send me a PM.
If you find bugs, please let me know, or post an issue on GitHub.
Find the devlog here: https://www.commanderx16.com/forum/index.php?/topic/1079-concerto-dev-log/
Find m00dawgd's Command Tracker which will likely use Concerto: https://www.commanderx16.com/forum/index.php?/topic/978-command-tracker-dev-log/