DC28 Jam Con Badge

Instrument-tuner on a badge for DEF CON 28 in 2020.

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A musical instrument tuner on a badge, sensing just one important pitch: concert A 440Hz.

I'm using a Teensy 3.2 for prototyping because,

  1. It does fast signal processing because its processor implements Cortex m4,
  2. It's a decent Arduino-compatible experimenting board,
  3. It seems to be power-consumption efficient, using much less power than Teensy-4, Raspi, etc.

This project is 50/50 hardware and software, but the classification makes me choose just one. I'm thinking that the software (programming) will take more work than the hardware. I'm just going on my knowledge of commerical musical instrument tuners --- it's taken a number of years for them to get "good". And highly rated ones cost over $100 US. So I'm assuming that the programming may be tricky. Especially "locking on" to the pitch being played, and being useful as a tuner, not simply a frequency readout.

I'm looking into trying ML with TensorFlow light to determine whether the incoming sound is an in-tune note. 

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Mike Szczys wrote 08/27/2019 at 10:41 point

It's still August and you're working on next year's badge design... this is the way to do it!

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Robb wrote 08/27/2019 at 21:00 point

Thanks! Yeah, I don't want to end up soldering in my hotel room the night before. I saw a bunch of people doing that!

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