Dual Fastest ADSR in the West

Dual envfelope generator using René Schmitz' "Fastest ADSR in the West" schematic.
Based upon 555 timers.
With attenuverted outs and manual triggers.
Input 1 is normalled to input 2 when nothing is connected to input 2.

https://www.eddybergman.com/2024/12/ADSR%20Rene%20Schmitz.html