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SOLVED - Full-Speed USB fix works! Uncommented this line in usb.c: USB1_PORTSC1 |= USB_PORTSC1_PFSC; // force 12 Mbit/sec File location:AppData\Local\Arduino15\packages\teensy\hardware\avr\1.59.0\cores\teensy4\usb.c Pixel 7 now...

Question for Paul Stoffregen: Can Teensy 4.0 force Full-Speed (12 Mbit/s) for USB MIDI? Based on the USB descriptor comparison, I believe I've found the root cause: CME XKey (works on Pixel 7): Full-Speed USB (12 Mbit/s), Endpoint 1, 64-byte...

Here's the real side-by-side comparison of the Xkey and the Teensy: SIDE-BY-SIDE COMPARISON Field XKey (WORKS) Teensy (FAILS) VID 0x258F (CME) 0x16C0 (PJRC) PID 0x0B01 0x0485 USB Speed Full-Speed (12 Mbit/s) High-Speed (480 Mbit/s)...

I compared descriptors:XKey (works on Pixel 7): VID 0x0D8CTeensy (fails on Pixel 7): VID 0x16C0Both have identical structure - Audio Control + MIDI Streaming, no HID.Could Pixel 7 be filtering by Vendor ID? Is there a way to change Teensy's VID...

Confirmed: Your hex file loaded correctly. USBTreeView shows: - bNumInterfaces: 2 - Interface 0: Audio Control (0x01/0x01) - Interface 1: MIDI Streaming (0x01/0x03) - No HID interface - bDeviceClass: 0x00 This is a pure MIDI device, exactly as...

I loaded your InputRead_ino.hex file to my Teensy.Result: My Pixel 7 (not Pro) still does not see it in Chrome MPE Monitor.This confirms the issue is NOT the HID/SEREMU interface, since your hex file has pure Audio Control + MIDI with no...

This is exactly what I need! Your descriptor shows:- Audio Control interface ✓- MIDI Streaming interface ✓ - NO HID/SEREMU ✓- bDeviceClass=0x00 ✓This matches my working XKey perfectly.Can you share HOW you achieved this? Which files did you...

Thank you submo! Unfortunately my Pixel 7 is stricter than your OnePlus Nord2. I tried the exact same setup: Midi Interface_3x3 example USB Type: MIDI x4 Default Teensy core files (no modifications) Results: OnePlus Nord2 (yours): ✓...

SUBJECT: Teensy 4.0 USB MIDI not recognized by Android (Pixel 7) - HID interface issue? Hi everyone, I'm developing a MIDI controller using Teensy 4.0 and having trouble getting Android to recognize it. The same device works perfectly on...