[LAU] midi backend not working in qjackctl?

Ralf Mardorf ralf.mardorf at alice-dsl.net
Wed Mar 14 17:14:59 UTC 2012


On Wed, 2012-03-14 at 13:09 -0400, Paul Davis wrote:
> On Wed, Mar 14, 2012 at 1:00 PM, Devin Anderson
> <surfacepatterns at gmail.com> wrote:
> 
> > The 'alsarawmidi' slave driver in JACK 2 does not have this problem.
> 
> right. that's what i was trying to distinguish between. when did that
> code get into jack2?

On Wed, 2012-03-14 at 17:32 +0100, Ralf Mardorf wrote:
> IIRC it was in April 2011 Jack2 1.9.8 from svn. Here hw jitter is
> close to zero.

On Wed, 2012-03-14 at 10:00 -0700, Devin Anderson wrote:
> The 'alsarawmidi' slave driver in JACK 2 does not have this problem.
> It postpones the delivery of events based on the audio buffer size.
> Back in April, when I requested MIDI latency/jitter test results for
> the driver, I saw peak jitter results as low as 60 microseconds.

;)
Ralf



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