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zerolanding wrote:

A little off topic but, oddly enough the Z80 processor at the core of the dmg has been used in many instruments including famous ones. here is the list of DMG cousins in music:
MIDI sequencers such as E-mu 4060 Polyphonic Keyboard and Sequencer, Zyklus MPS, and Roland MSQ700 were built around the Z80,[citation needed]
MIDI controllers and switches such as Waldorf Midi-Bay MB-15 and others.[citation needed]
Several polyphonic analog synthesizers used it for keyboard-scanning (also wheels, knobs, displays...) and D/A or PWM control of analog levels; in newer designs, sometimes sequencing and/or MIDI-communication. The Z80 was also often involved in the sound generation itself; implementing LFOs, envelope generators and so on. Known examples include:
Sequential Circuits Prophet 5, Prophet 10,[65] Prophet 600, Six-Trak, Multitrak, MAX, and Split-8
MemoryMoog six-voice synthesizer[66]
Oberheim OB-8 eight-voice synthesizer with MIDI
Roland Jupiter-8 eight-voice synthesizer
Digital sampling synthesizers such as the Emulator I, Emulator II, and Akai S700 12-bit Sampler,
as well as drum machines like the E-mu SP-12, E-mu SP-1200, E-mu Drumulator, and the Sequential Circuits Drumtraks, used Z80 processors.
Many Lexicon reverberators (PCM70, LXP15, LXP1, MPX100) used one or more Z80s for user interface and LFO generation where dedicated hardware provided DSP functions.
The ADA MP-1. A MIDI controlled, vacuum tube, guitar pre-amplifier.

Wonder if anybody has scoured the code of any of these devices for anything that could be applied towards synth building?

very neat

Electronics Engineer. I design a bunch of stuff on FPGAs.

henry homesweet used (and may or may not still use) a headlamp onstage for visibility
it's kind of ridiculous, but it works.

It was intended to be a wild exaggeration (I know you can't boost voltage x2) and I think 3.4-5v is about as low as you can get...