[ardour-users] Weird lockup thing
eviltwin69 at cableone.net
Tue Jun 15 07:25:08 PDT 2004
TAP Reverberator has a denormal problem that causes exactly what you are
describing. Tom has built a new version that uses fixed point math
instead of floating point. It is in CVS. You can download it from the
TAP plugin web page. I haven't had a chance to test it yet. Why don't
you try it and post your results so Tom will know if it clears up this
On Tue, 2004-06-15 at 09:16, Nathaniel Virgo wrote:
> I'm not sure whether to post this to mantis as I'm not sure if it's an
> ardour or a plugin issue or just something odd about my system, but
> every now and then when I'm playing with LADSPA plugins my system
> suddenly becomes really sluggish, with the screen updating about once a
> second. So far it's only happened when using the TAP Reverberator or
> the GLAME Highpass filter (and possibly with the Tube Amp with tone
> controls, I can't remember). It's also so far only happened when using
> Ardour, although I haven't played much with plugins in other programs on
> this machine yet.
> Ardour doesn't get kicked out by JACK and the DSP usage meter doesn't go
> up (it stayed at 11.2% last time it happened). The response time gets
> slower and slower as time goes on but if I manage to kill ardour or
> disable the plugin before it gets too bad to do that it goes straight
> back to normal. If it gets too bad I have to reset the machine.
> Sometimes I can hear a click at longer and longer intervals, which I'm
> guessing is a buffer's worth of audio arriving at the soundcard. It
> seems to happen at a fairly random point when I've been using the plugin
> for a while, but last time it happened it was just as the GLAME filter
> stopped recieving any input, which makes me think it could be a denormal
> thing maybe?
> I'm using QJackCtl - my .jackdrc says /usr/bin/jackstart -R -t5000
> -dalsa -dhw:0 -r44100 -p512 -n2. This is a pretty standard Planet CCRMA
> install and the problem happens in CCRMA's ardour beta11.2 and beta16.1
> which I installed from the tarball.
> It's a second-hand laptop so I'm not entirely sure about all the
> hardware but the CPU is a P4 2.6 GHz, the soundcard is the onboard one
> for the time being (driver seems to be snd-intel8x0 maybe?) and I think
> most of the other stuff is made by SiS.
> Any help you can give me or advice about where to report the problem to
> would be much appreciated. I can provide more information if you tell
> me how to get it!
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