Jedi Storm wrote:
> When I did some debug with Qsynth it seems that filtered the note-off
> events.
>
> Now that I did a debug directly with fluidsynth I'm able to see the
> note-off.
So your problem is likely to be the timing of note-off events, as Ken
said, and it should be solved by stripping them out.
Try filtering your input events with the attached tool.
HTH
Clemens
/*
* filters out note-off events
*
* compile with:
* gcc -o strip_note_offs strip_note_offs.c -lasound
*/
#include <stdio.h>
#include <alsa/asoundlib.h>
int main(void)
{
snd_seq_t *seq;
int i, o;
int err;
err = snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0);
if (err < 0) {
fprintf(stderr, "cannot open sequencer: %s\n", snd_strerror(err));
return 1;
}
err = snd_seq_set_client_name(seq, "Note-Off Stripper");
if (err < 0) {
fprintf(stderr, "cannot set client name: %s\n", snd_strerror(err));
snd_seq_close(seq);
return 1;
}
i = snd_seq_create_simple_port(seq, "Input",
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_SOFTWARE |
SND_SEQ_PORT_TYPE_PORT);
if (i < 0) {
fprintf(stderr, "cannot create port: %s\n", snd_strerror(err));
snd_seq_close(seq);
return 1;
}
o = snd_seq_create_simple_port(seq, "Output",
SND_SEQ_PORT_CAP_READ |
SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_SOFTWARE |
SND_SEQ_PORT_TYPE_PORT);
if (o < 0) {
fprintf(stderr, "cannot create port: %s\n", snd_strerror(err));
snd_seq_close(seq);
return 1;
}
for (;;) {
snd_seq_event_t ev;
snd_seq_event_t *evp;
int err;
err = snd_seq_event_input(seq, &evp);
if (err == -ENOSPC)
continue;
if (err < 0) {
fprintf(stderr, "cannot read event: %s\n", snd_strerror(err));
snd_seq_close(seq);
return 1;
}
ev = *evp;
if (ev.dest.port != i)
continue;
if (ev.type == SND_SEQ_EVENT_NOTEOFF ||
(ev.type == SND_SEQ_EVENT_NOTEON && ev.data.note.velocity == 0))
continue;
snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_source(&ev, o);
snd_seq_ev_set_direct(&ev);
err = snd_seq_event_output_direct(seq, &ev);
if (err < 0) {
fprintf(stderr, "cannot send event: %s\n", snd_strerror(err));
snd_seq_close(seq);
return 1;
}
}
snd_seq_close(seq);
return 0;
}
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