ESP32-P4 OTG Mode MIDI lost packets with SysEx data Rx

[jaredsummer]

Hi,

I’m testing the ESP32-P4 for use as a USB OTG MIDI device. I have code in place to read MIDI packets, and everything seemed to be working fine until I started testing SysEx data.

When my app (running on a Mac) sends a burst of SysEx messages (each less than 12 bytes, with 16–24 messages per burst), I’m unable to read all the packets—some messages are dropped. These drops are not reported in the TinyUSB debug output. It simply seems that not all the data sent by the app reaches the interface (as observed using the MIDI Monitor app on macOS).

Is this a known bug or limitation in the current version of TinyUSB for the ESP32-P4?

Thanks,
J.