Re: ALSA MIDI on Raspberry PI: no events from input device (USB keyboard)

Clemens Ladisch via Alsa-user <[email protected]> Sun, 31 Jan 2021 17:27:08 +0100
Newsgroups gmane.linux.alsa.user
Message-ID <[email protected]>
Fernando Carello wrote:
> So, I've seen that a working MIDI keyboard "creates" this device:
>
> /dev/snd/-midiC0D0
>
> while my problematic MIDI keyboard has instead:
>
> /dev/snd/-midiC1D0

"C1" means "card 1"; this is because card 0 is already occupied by another device.

> The keyboard seem to send raw midi messages in a stream, but Alsa does
> not translate them in Sequencer events.

Strange. This should happen automatically, especially if the sequencer
device (port 20) is there.

Does the count in /proc/asound/card1/midi0 increase while aseqdump
is running?


Regards,
Clemens