18 Jun
2005
18 Jun
'05
10:01 a.m.
Atte André Jensen wrote:
I need a program that will allow me to send predefined
program changes
to alsa clients.
You could load snd-virmidi, connect its port(s) to the destination
port(s), and then call something like
amidi -p hw:X,Y -S "c1 23"
If not, could anyone point me in the right direction
of some
documentation on how to write such a program, esp how to register as an
alsa-client and exactly what should be send out how for it to be program
change.
In C, this would be something like this:
snd_seq_t *seq;
snd_seq_event_t ev;
snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0);
snd_seq_set_client_name(seq, "my funky program changer");
snd_seq_create_simple_port(seq, "source port",
SND_SEQ_PORT_CAP_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_APPLICATION);
snd_seq_ev_clear(&ev);
snd_seq_ev_set_dest(&ev, dest_client, dest_port);
snd_seq_ev_set_direct(&ev);
snd_seq_ev_set_pgmchange(&ev, channel, program);
snd_seq_event_output_direct(seq, &ev);
HTH
Clemens