My student made a tutorial about this: https://create.arduino.cc/projecthub/dinan_y/looping-box-3224e4. I think the LEDs get out of sync in this version when the erasing happens, but the audio looping works smoothly.
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I've been working on the same thing today (looper with overdub using serial flash) and got it working. I'll post some code or tutorial later, but basically what I did:
- I have three erasable files
- One file is...