14 Jul
2010
14 Jul
'10
7:42 p.m.
On 07/14/2010 06:31 PM, Nedko Arnaudov wrote:
Robin Gareus
<robin-+VlDMftONaMdnm+yROfE0A(a)public.gmane.org> writes:
release-4 - the latest on svn://svn.gna.org/svn/a2jmidid
I was hinting that the audible midi-jitter could
be a result of
midi-messages getting 'quantizied' to jack-periods.
A JACK-MIDI app which does not honor 'jack_midi_event_t->time' but
simply processes all queued midi-events on each jack_process_callback()
will result in the symptoms you describe (snare & kick on the same
beat). One example of such an app is "a2j".
What version? I can clearly see code that handles this in the
current
version. It is in jack.c, a2j_alsa_output_thread(), lines 385-411
I've just seen that there's git://repo.or.cz/a2jmidid.git and jumped
from release-4 to release-6.
ciao,
robin
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14 Jul
14 Jul
9:25 p.m.
New subject: ALSA MIDI latency test results are far away from reality
On Wed, Jul 14, 2010 at 1:42 PM, Robin Gareus <robin(a)gareus.org> wrote:
On 07/14/2010 06:31 PM, Nedko Arnaudov wrote:
the code you cited does not do that. it is in a loop that sleeps until
each queued MIDI event should be delivered. it explicitly does *not*
deliver them all at once. its one inaccuracy is that it will not
attempt to sleep for less than 1msec, so if you have 2 messages
separated by less than 1 msec, they will be delivered one directly
after the other.
Robin Gareus
<robin-+VlDMftONaMdnm+yROfE0A(a)public.gmane.org> writes:
release-4 - the latest on svn://svn.gna.org/svn/a2jmidid
I was hinting that the audible midi-jitter could
be a result of
midi-messages getting 'quantizied' to jack-periods.
A JACK-MIDI app which does not honor 'jack_midi_event_t->time' but
simply processes all queued midi-events on each jack_process_callback()
will result in the symptoms you describe (snare & kick on the same
beat). One example of such an app is "a2j".
What version? I can clearly see code that handles this in the
current
version. It is in jack.c, a2j_alsa_output_thread(), lines 385-411
I've just seen that there's git://repo.or.cz/a2jmidid.git and jumped
from release-4 to release-6.
5294
days inactive
5294
days old
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