[PlanetCCRMA] added: ALPHA version of Planet Core components for FC2

Steve Harris S.W.Harris@ecs.soton.ac.uk
Fri Jun 25 02:59:01 2004

On Thu, Jun 24, 2004 at 05:12:54 -0700, Fernando Pablo Lopez-Lezcano wrote:
> On Thu, 2004-06-24 at 12:49, Fernando Pablo Lopez-Lezcano wrote:
> > > I played with 2.6's jackd again last night, with the LD_ASSUME_KERNEL
> > > trick (assuming I spelt it right ;), but I still cound't get anything like
> > > relaible realtime performance.
> > 
> > I think that is the correct spelling. 
> > 
> > I still get weird behavior and I haven't had time to do any more
> > testing. I noticed something yesterday. I would start qjackctl, then
> > hydrogen and a bunch of other apps (pipe hydrogen through freqtweak and
> > jackeq). 
> _and_, I forgot, jack-rack running gverb. 
> And I think _that_ is the problem. 

I haven't been able to get anything like that kind of stability. If I run
AMS, then try to run jamin within a minute I will get a storm of messages,
then jackd will deteriorate to the point where apps will no longer be able
to connect. I had to reboot a couple of times. This is running at 2x256.
> Can we say "denormals"??
> The tail end of the reverb slowly dies and eventually gets to the point
> where it fades to almost zero. That would do it, right? And explain why
> it happens after hydrogen is done with its run? So it is not a
> coincidence after all...

That does sound exactly like denormals. Are you running a P4 by any

> Exactly what software are you using to test?

I've only tried AMS and jamin (debugging) with the RT kernel, with the
stock fedora one I've run a variety of stuff, it xruns occasioanlly,
as you would expect, but no storms.

- Steve