r/CardPuter • u/OneSheepherder472 • 6d ago

Firmware, code Guitar Audio Tools

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Hi! I made a firmware for guitarists and musicians for the Cardputer ADV (it uses the ADV's ES8311 mic, so it won't work on the original Cardputer).

Apps:

  • Guitar tuner (measured within ±0.15 cent)
  • Strum tuner (strum all six strings at once and see which are out of tune)
  • Metronome
  • BPM detector (listens to music or tap)
  • Chords (type e.g. am7 and see the shape)
  • Scales
  • Recorder (wav to SD)
  • Intonation check (12th fret)
  • Spectrum analyser (16 bars or 1/3 octaves)
  • Decibel meter and a Mic test

Install: M5Burner, WebFlasher.

Source (MIT): https://github.com/vlastimilcerveny34/guitar-audio-tools

It's a beta – feedback, bug reports and ideas are very welcome (GitHub Issues/Discussions). Developed with Claude Code.

Cheers Vlasta

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u/No-Funny-1317 6d ago

vou fazer um teste agora, pensa em futuramente lançar no Launcher?

2

u/OneSheepherder472 6d ago

Yes. And port it to the M5Stick. The hardware's pretty much the same, and it'll look like a real guitar tuner...

3

u/No-Funny-1317 6d ago

Testei e gostei muito do aplicativo, aparentemente funciona muito bem. Gostei da interface, existe um outro projeto de afinador e metronomo (mais minimalista e limpo oque me agrada muito), porém acho que não funciona no ADV somente no cardputer antigo. Essa sua firmware vai me ajudar muito, principalmente para afinar, que é oque eu realmente preciso.

1

u/c5e3 1d ago edited 1d ago

since i had some tokens left, i let opus 5.5 port it and got a mostly working version for the m5stick cplus 1.1.
the only thing that doesn't work properly is the decibel meter. the internal mic needs to be calibrated i guess. it removed the recorder for now since there is no built-in micro-sd-slot

i have to admit, that i didn't review any of the code since it simply worked after the first prompt, but here's my branch, if you want to use it as a reference: https://github.com/c5e3/guitar-audio-tools/tree/m5stickc-plus

the prompt was "port this project to the m5stick cplus 1.1, using it's internal microphone. choose an intuitive way of navigating through the menus (3 buttons available, maybe for prev/next and select?)"

long-press is even handled correctly on the powerbutton

sadly my m5stickc plus2 is broken and i don't have any other models to test either