Hero999, for now I'm using a PIC with a super simple program to turn on a MOSFET for about 1ms when I hit a switch, but the finished project will be controlled all from 7400/4000-series logic and a huge amount of switches.
I'm using the LM358 just because it was the first thing I saw on my bench haha, in the final design I'll probably use the LM833 since I have a massive amount of them.