How about a complete battery-powered MIDI monosynth in CircuitPython synthio? Three oscillator w/ 2-pole resonant low-pass filter. Great for basslines! Both USB & Serial MIDI. Responds to MIDI velocity & CCs to adjust loudness, filter, vibrato, and release time. https://www.youtube.com/watch?v=S1-TDjxE3Qs #CircuitPython#SynthDIY#MIDI#synthio
omg I'm on the @realpython podcast, "Resources and Advice for Building CircuitPython Projects". We talk about #CircuitPython but also #SynthDIY, and hacking in general. (Apologies in advance for my rambling, I am unused to speaking to people in real-time) Thank you, @digiglean, for being such a gracious host! https://realpython.com/podcasts/rpp/161/
@todbot@realpython@digiglean Just listened to it. Great job! Happy to help you dig into y he core more. The challenge with loadable native code is managing all of the different instruction sets and memory maps.
I've had a few queries now about my DX100 fault-finding, so I've just hit publish on the second blog describing some further investigations (it's been sitting in draft for a month or two now).
It's all stuff that I've already posted here - the ROM checking, my Arduino ROM reader, and the problems I've had finding the connectors (which is still unresolved)...
So nothing really to conclude, other than I'm still working on it!
I'm looking at pole-mixing filters again which I implemented in my voice card design. Instead of having fixed filter responses I think of mixing the five signals with VCAs and have full voltage control on all signal components. This would mean you can dial in all possible filter responses but also shift them over time with an ADSR or other voltage source. Take a look at this great article on Electricdruid on the topic: https://electricdruid.net/multimode-filters-part-2-pole-mixing-filters #synth#synthesizer#synthdiy@synthdiy
Ok, so I can now change voices (8 banks of original DX7 ROMs loaded), use controllers, and pitch bend on my #PicoDexed
I need to decide how best to control it. I didn't really want a built-in user interface like MiniDexed, but instead was thinking of something else poking it over MIDI.
Doesn't mean I can't do another Pico with a MiniDexed-like UI of course - I just don't want it all tied to the main synth engine.
It lists all my MIDI and audio related PCBs so far that I've made for Raspberry Pi (V3/V4, V1, Zero, 400); Raspberry Pi Pico; Arduino Uno; Arduino Nano; Seeed XIAO; and a few other odds and ends.
It also provides the context for the use of the designs and links to all the relevant design and build notes.