25 Mar
2010
25 Mar
'10
6:19 a.m.
Excerpts from fons's message of 2010-03-25 00:47:08 +0100:
(forgot to copy this to LAD)
On Wed, Mar 24, 2010 at 06:45:00PM -0400, Paul Davis wrote:
Very strange, -Xraw is said to perform better than -Xseq.
Maybe there's a difference between outboard and software?
In software land jack midi is the clear winner, -Xraw is said to perform
better than -Xseq, so if it's different for outboard gear, where does
the difference come from?
On Wed, Mar 24, 2010 at 5:59 PM,
<fons(a)kokkinizita.net> wrote:
It was -X raw. I just repeated the test with -X seq
and that provides a completely different picture.
Jitter is +/- 2 frames, with occasional outliers
at around 160 frames, nothing in between.
That is with a 30-track Ardour session running in
the background, DSP load 15%, CPU load 27%.
Unpatched 2.6.32 kernel (which may explain the
occasional larger error).
Not bad at all.
Ciao, When connected via a loopback on a HW interface
I expected the worst case to be events quantised
to Jack period (256 frames). Actually it's 10 times
what bridge were you usng between JACK and ALSA?