On Mon, May 30, 2011 at 10:28:14AM +0200, Jörn Nettingsmeier wrote: > On 05/28/2011 01:37 AM, Jörn Nettingsmeier wrote: >> On 05/27/2011 10:08 PM, Fons Adriaensen wrote: > >>> I've got a strange problem with MFV. *Something* is poisoning >>> the signal graph with Nans or Infs. One visible result is that >>> e.g. the W channel of one of the jkmeters shows only peaks and >>> no RMS values (this is to be expected if the filter state gets >>> a Nan - once a Nan always a Nan). The other indication is that >>> adding an Ambdec produces a never ending xrun storm even if the >>> effective CPU load remains below 10%. >>> >>> Have you seen anything similar ? >> >> not in this session. sc4 can be funny at times, but i haven't had any >> issues with it for quite a while. i don't have access to the session >> atm, will ake a look when i return home on sunday. meanwhile, if you >> want to pinpoint the problem, try muting all channels and then unmute >> one by one. >> >> do the nans crop up immediately, or only after playing some audio? > > i just tested the session again, and i don't see any NaNs or INFs. what > i did notice, though, is that i'm burning a ridiculous amount of cpu for > this tiny little arrangement - i had tried with 64 frames initially, and > it maxes out immediately (on an 2.6 ghz i5 quad-core). safe way to run > it is at -p 1024 -n2. Turned out to be jconvolver. Added some Nan testing code to zita-convolver and the problem disappeared, also without the extra code. Could be I accidentally installed a version compiled on another machine. But then it's a miracle non of this showed up earlier... I'm running it on dual qaud-core, period size 256, and CPU load remains below 10%. Nice recording BTW. The flugelhorn solo triggered happy memories of recording the BRTN jazz orchestra - we had an marvellous trumpet / flugerhorn player then, Bert Joris <http://www.bertjoris.be/>. Ciao, -- FA _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
