As a continuation of Dynamic Sound Editor...
I finished adding the remaining PSG configuration options to my 6502 Dynamic Sound Editor. The following video shows it in action. I am using a pair of YM2149 PSGs in this video. In the weeks to come, hopefully I'll have four PSGs running simultaneously. If you use your imagination, you can hear the undertones of a 1980's game. :)
Postscript
I added support for basic "sequences."
MIDI keyboard capture into sequences for playback on the 6502. The capture code automatically converts keys from all octaves of the keyboard to the appropriate course and fine tone periods, adds it to the sequence, and then allows playback of the sequence through the 6502 audio.