MicroGroove v1.0.0

First public release of Microgroove — a pocket groovebox & sampler for the
M5Stack Cardputer-ADV.

Flash it — pick one

• Pre-built binary: microgroove.bin is a merged image — flash to offset
  0x0 (esptool.py write_flash 0x0 microgroove.bin) or any ESP32-S3 tool.
• Arduino IDE: download Microgroove_source.zip, unzip, open
  Microgroove.ino, install the M5Cardputer library, and Upload
  (see HOW_TO_FLASH.txt inside).
• Then copy Microgroove_SD_card.zip onto a FAT32 microSD for the factory
  demo + CC0 sample pack. No card? Hold LOAD+SAVE for a built-in demo.

What's inside

• 3 synth tracks, each switchable between a mono 303-style voice (slide +
  accent) and 2–3-voice polyphony for chords
• 8 drum lanes: 808 synthesis, 909 synthesis, or SD samples; per-lane tune,
  decay, and choke groups
• Live mic sampling (hold AUX) and engine resampling (hold SONG while playing)
• 8 patterns × 16 steps, hold-to-clone, bar-quantized switching, 64-slot song mode
• 8 user wavetable slots, 8 project slots on microSD
• One key = one function; hold any orange-labeled key 0.5 s for its second function

Notes

• Project files use the GBX v2 format; older v1 files load transparently.
• Full guide: docs/USER_MANUAL.md · keymap: docs/keymap-v6.png

Firmware is MIT, derived in part from qwertyuu/Cardputer-Adv-Tracker. Factory
sample pack is CC0.