4 IN 1 ESC stopped working (ESCS 2 and 4 don't show up in BLHELI suite, and they don't make their startup tones when I plug in a battery. Pls help : r/Multicopter
How To Add Musical Startup Tones To BLHeli 32 ESCs - YouTube
How to Flash Bluejay Firmware to BLHeli_S ESC - Oscar Liang
Response to Brian Schwab - Troubleshooting BLheli Startup Tones - YouTube
Play Music with ESC and Motors! | BLHeli_32 Custom Startup Tones - Oscar Liang