That seems pretty regular at 8 to 10 minute intervals. Do you live near a subway line? Or other electric mass transit option? Is the computer on a UPS or power conditioner type supply line? I get a spike like that when I use a battery box to power an electret mic. If I turn it on after pressing record. Beyond that, your guess is as good as mine.
- James On 5/20/11, Peter Hoffmann <p...@peter-hoffmann.com> wrote: > Hello, > > I'm recording audio 24/7 with a delta 1010 sound card and have a > strange problem: > > Every night at 2:30 I get spikes and some inaccurancy within some > seconds in a one hour length recording. I've upload a screenshot to > illustrate the problem: > > http://img88.imageshack.us/img88/4562/spikesh.png > > My .asoundrc > > pcm.capt { > type dsnoop > ipc_key 223456 > slave { > pcm "hw:0,0" > rate 8000 > period_time 0 > period_size 320 > channels 12 > format S32_LE > } > } > > pcm.c1 { > type plug > ttable.0.0 1 > slave.pcm capt > } > > pcm.c2 { > type plug > ttable.0.1 1 > slave.pcm capt > } > > pcm.c3 { > type plug > ttable.0.2 1 > slave.pcm capt > } > > pcm.c4 { > type plug > ttable.0.3 1 > slave.pcm capt > } > > pcm.c5 { > type plug > ttable.0.4 1 > slave.pcm capt > } > > pcm.c6 { > type plug > ttable.0.5 1 > slave.pcm capt > } > > pcm.c7 { > type plug > ttable.0.6 1 > slave.pcm capt > } > > pcm.c8 { > type plug > ttable.0.7 1 > slave.pcm capt > } > > I'm recording with arecord -q -f cd -t wav -d 3600 -c 1 -D c1 out.wav. > > Any hints where the problem might be? > > Kind Regards, > Peter Hoffmann > > ------------------------------------------------------------------------------ > What Every C/C++ and Fortran developer Should Know! > Read this article and learn how Intel has extended the reach of its > next-generation tools to help Windows* and Linux* C/C++ and Fortran > developers boost performance applications - including clusters. > http://p.sf.net/sfu/intel-dev2devmay > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
