Denis wrote: > I wrote a c code to send MIDI message "NOTE ON" to sequencer, but I get > "Segmentation fault". > What's wrong with it?
Some fields of ev contain random data, so you better clear it before using it: snd_seq_ev_clear(&ev); > ev.type = SND_SEQ_EVENT_NOTEON; > ev.data.note.channel = 0x00; > ev.data.note.note = 0x30; > ev.data.note.velocity = 0x7f; > ev.data.note.duration = 0x7f; .duration isn't needed for a _NOTEON event (only for _NOTE event, and then you would need a running queue). And some other fields need to be set (see seqmid.h for the definitions of these macros): snd_seq_ev_set_source(&ev, portid); // source port snd_seq_ev_set_subs(&ev); // send to all subscribers snd_seq_ev_set_direct(&ev); // send directly, not through a queue > snd_seq_event_output_direct(ctxp,&ev); Now it should be working. HTH Clemens ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The debugger for complex code. Debugging C/C++ programs can leave you feeling lost and disoriented. TotalView can help you find your way. Available on major UNIX and Linux platforms. Try it free. www.etnus.com _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user