one of my I-wish-I-had-the-skill-and-time interests is looking at projects using microscope images to reverse engineer bespoke, rare or undocumented chips, recover the netlist and perfectly emulate them ... I have also been musical and always been keyboard-curious but never gotten into it ... all that to say that this recent video from #3c93 combines all of these into one neat package - reverse engineering the Motorola DSP53600 as used by many 90s digital virtual analogue synthesizers, notably the Roland JP-8000 https://media.ccc.de/v/39c3-from-silicon-to-darude-sand-storm-breaking-famous-synthesizer-dsps