Stereo headset with mic?

[anichang]

Hi,

I need to connect a stereo headset with microphone (example) to the M5Stack.

I have also a couple of PAM8403 boards that could be used to amplify the speakers; but I don't know if it is possible to use one of those as a mic preamp. But I saw a preamp on the ESP32, can I use that one for the mic? Are those two pins available on the M5Stack?

Thanks

[JJ]

@anichang Hi Anichang, interesting question. I'm into audio.

Check this out - nice audio quality: https://twitter.com/ksasao/status/972853730453241857

GPIO36 seems to be the approach taken so far for audio input - also by macsbug:
https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=https%3A%2F%2Fmacsbug.wordpress.com%2F2017%2F12%2F&edit-text=&act=url

Perhaps for your purpose with the external mic and the PAM board you were talking about using the I2S (or IIS) pins - IIS_IN (G34) and (IIS_OUT (G15) ???

I don't think they are being used by anything obvious on the M5Stack - (screen,buttons,TF card)......

The M5Stack guys recently demoed audio playback using I2s on twitter recently.... i gather they output using the DAC (g25). Using Python: https://twitter.com/M5Stack/status/972058080081883136

Anyone else got any info on audio input?