Ru Vuott wrote:

hData = OPEN "/dev/snd/midiC2D0" for READ Watch

Do you think this solution could interfere and give problems to ALSA ?

Yes; this opens the device exclusively. The ALSA sequencer would be able to allow multiple applications.

The rest of my program (for sending midi event, etcetera) continue to use ALSA.

How are you using ALSA from Gambas? Is there some ALSA module that could be extended to ALSA watches?

Regards, Clemens