Oliver Rockstedt

But it's possible that you need to call the `poll()` function without any classes to get the USB communication handled. Not sure about this though.

> Same, no changes. That indicates a more fundamental problem in the hardware setup or the clocks.

I did some more detailled measurements with my ESP32-S3-DevKitC-1. I connected a pot to GPIO3 and set some inbetween voltages. As you can see, all calibrated results below 0.3V are...

I can confirm that ADC readings are much better now.

I ran into a similar issue years ago with Windows, where the data was not read until some application opened the port. But apparently there is no other solution than...

> Since I am sending also to MIDI out on UART, I would probably check in a background task if an application is listening on usb. Is there a good...

This is also necessary for USB audio when supporting multiple formats (e.g. sample rates) because each requires an alternate setting.