Re: Edit2: you'll need to press and hold BtnA to record something. The recording starts after the vibration and ends when BtnA is released (or after a certain amount of data has been recorded).

if (data_offset == 1024 * 100 || M5.Touch.ispressed() != true) break;

Thanks
Felix

Also

void microPhoneInit()
{
    InitI2SSpakerOrMic(MODE_MIC);
    
    // <------------
    xTaskCreatePinnedToCore(i2sMicroFFTtask, "microPhoneTask", 4096, NULL, 3, NULL, 0);
    // <-----------

}

The crashes stop when I exclude this line. Also the LEDs work fine then.

The mic/fft also does not show any minimal sign of signal, also within the 5 seconds before reboot. Maybe the Mic of the Bottom2 is broken? Is there a simple way to check if it is alive?

-- Edit: I updated all libraries. After bit more testing, the line seems to be pretty robust when it comes to the crash. But I also tried to adapt this M5Stick microphone example (M5Core2.h instead of M5Stick.h, the pins ought to be the same) but without success and it leads to a similar line xTaskCreate(mic_record_task, "mic_record_task", 2048, NULL, 1, NULL);

Btw. my Core2s are not flashed to have a lot of memory and maybe the queues are reaching the heap (as f.i. mentioned here). I used uxHighWaterMark = uxTaskGetStackHighWaterMark( NULL ); and I get number of 6100.

---Edit2: I tried this recording example, which is not parallelized by xTaskCreate, and it does not crash. Unfortunately I don't see any results after pressing 'record', it only starts to vibrate after 1-2 sec. and my other Core2 also makes a slight click&rumble sound. Shall I use VSCode+PlatformIO to debug?

--Edit3: I tried to patch tha partition / psram via this guide, I am not totally sure if it worked. And the record.ino. It doesn't crash, but the mic also only does the click/rumble after pressing record for 1.5s as before. Very strange..

hmm, the M5GO Bottom2 example works for me. However there was a similar report in this thread and @cpersoz had success using Adafruit_Neopixel instead of FastLED.

Thanks
Felix