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:
> > On Wed, Mar 24, 2010 at 5:59 PM, <fons@email-addr-hidden> wrote:
> >
> > > 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?
>
> 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,
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?
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Received on Thu Mar 25 12:15:02 2010
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