linuxaudio.org

On 05/28/2011 01:37 AM, Jörn Nettingsmeier wrote:

quoted text
> On 05/27/2011 10:08 PM, Fons Adriaensen wrote:

>> I've got a strange problem with MFV. *Something* is poisoning

quoted text
>> 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.
regards,
jörn
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