14 Mar
2012
14 Mar
'12
6 p.m.
On Wed, 2012-03-14 at 12:40 -0400, Paul Davis wrote:
On Wed, Mar 14, 2012 at 12:32 PM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Perhaps just good luck. For my old Envy24 sound card MIDI jitter
correlated to the latency. The more latency, the more positive and
negative drift I got for audio recorded MIDI events from hw synth.
I never made MIDI recordings since I own a RME card.
FWIW ALSA MIDI sequencer timer was hrtimer and tickless was enabled by
the kernel. It's also said that tickless should be bad and I experienced
it vice versa.
For soft synth I never noticed serious issues, at least not for my
production Linux, even if I used 'seq' instead of a2jmidid.
FWIW mobo ASUS M2A-VM HDMI, without the HDMI thingy , but instead a
GeForce 7200 GS. AMD Athlon dual-core BE-2350. Sound card TerraTec EWX
24/96, PCI. I won't refer to ascertained measurement results, they might
be wrong, but others and I heard "improper timing" before and steady
timing when using -Xalsarawmidi.
- Ralf
IIRC it was in April 2011 Jack2 1.9.8 from svn.
Here hw jitter is close
to zero.
then your definition of jitter is very different from mine.