I tried to emulate the Moog Grandmother follwing the block Diagram by Syntherjack at
https://syntherjack.net/wp-content/uploads/2018/08/moog-grandmother-block-diagram-LQ-syntherjack.png
Still having trouble on the ADSR envelope mode, and other fixes, but up to now it was a fun experiment :)
not sure where its coming from but im getting a weird big delay between when i press a key and when i actually hear anything