MIDI Not working

[meltdown03]

When I try the MIDI example, it builds and runs ok, but I dont see the MIDI device on my system. Running lsusb -v shows that the Espressif Device is there and has some MIDI properties, but no program that uses MIDI cannot see or use it. I tried it in Windows and Linux.

[chegewara]

yes, i found it recently too. I am not working with midi and i dont know it at all, thats why i didnt found it earlier.

The problem is with USB descriptor, but dont know what yet. I am busy in next few weeks, so it has to wait.

[meltdown03]

Ok, I'll try to dig in. It used to work. So I'll try to see what descriptor changed.

…

On Wed, Sep 8, 2021, 7:36 PM chegewara ***@***.***> wrote: yes, i found it recently too. I am not working with midi and i dont know it at all, thats why i didnt found it earlier. The problem is with USB descriptor, but dont know what yet. I am busy in next few weeks, so it has to wait. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#52 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABPBQCAVVDWX5GCTF2FLIMTUA76Q3ANCNFSM5DV6WI6A> .

[chegewara]

In this library descriptor didnt change. It may be some issue in tinyusb, which will be harder to track down.

[meltdown03]

I found the fix:

EspTinyUSB/src/classes/midi/midiusb.cpp

Line 2 in 991acff

#define EPNUM_MIDI 0x06

Change EPNUM_MIDI to 0x01 and it works

[meltdown03]

I found it by looking at the TinyUSB midi-test example

[chegewara]

Good catch. esp32 S2 does not have that many endpoints.

[meltdown03]

Good catch. esp32 S2 does not have that many endpoints.

Yeah, i guess it works with 0x05 too. Is there a specific one? or doesnt it matter?

Nevermind, it shows up but does not play anything with 0x05, lol

[chegewara]

As long as you dont want to mix it with other USB class it does not matter. 4 or 5 would be good.

[meltdown03]

As long as you dont want to mix it with other USB class it does not matter. 4 or 5 would be good.

Ok, 4 works, but 5 doesn't, weird because that's what the esp32-hal-tinyusb.h file has for USB_INTERFACE_MIDI