On Mon, 3 Mar 2008 19:59:42 +0100
Fons Adriaensen <fons@xxxxxxxxxxxxxxx> wrote:
> One way to test for exact sync is to use jdelay, with an analog
> loopback from an output on card A to an input on card B.
> Let it run as long as you can and verify if the delay is stable.
Thanks for the advice and for jdelay!
I started jack up:
jackd -R -P70 -dalsa -r44100 -p128 -n2 -D -Cmulti_capture -Pmulti_playback -m -H -M
My first test sent jdelay's output through a port on card 0, which was
patched to an input iput on card 1, which jdelay used to complete the
loop.
I consistently got a delay of 453.485 frames, +/-0.001.
I then patched an output on card 0 to an input on card 0, and got
454.166 or 454.167 frames.
Finally I looped ports on card 1, and got 452.151 frames, +/-0.001.
These seem like perfectly cromulent numbers to me.
Thanks to Fons, Kevin and Mark for the enlightenment.
--
======================================================================
Joe Hartley - UNIX/network Consultant - jh@xxxxxxxxxxxx
Without deviation from the norm, "progress" is not possible. - FZappa
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