I'm alpha-testing my Cruft Concertina's mechanical design this month. I'm starting to load up the wiki page with pics and documentation, but I've only just started, so please bear with me. The url is:
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My alpha testing consists of abusing the hell out of the mechanicals. I carried the poor thing around on my back for a day, dangling from its neck strap. I literally tossed it into the trunk of my car. And for the final test, I gave it to my kids to play with.
The ultimate alpha test is to learn a song on the Cruft, and see how well the mechanical memory translates to the Stagi.
Up next: after I resolve the mechanical issues, I need to write a bunch of user interface and synthesizer code. At the moment, the synthesizer is outputting a static waveform with no envelope shaping or air pressure response. That's enough to learn a song, but just barely. I'll be getting more serious about fixing the spimd over the next few months. I'll probably try a morphing wavetable synthesis first.
Here's a question that I could some input on. In the current design, all of the cables come off of the bottom of the right side of the concertina, meaning the part that would be resting on your knee. I thought I was being clever, because I'm a left-kneed player. But now it occurs to me that not everyone else is, so I should move at least a few of the connectors (headphone jack, especially) somewhere else. So what knee do you all use, if any?
Thanks to all for your continued inspiration.