On Fri, 8 Apr 2011, Sergei Steshenko wrote: > Hello, > > I've tried to run 'arecord' as part of simultaneous playback + capture "rig" > (for acoustic measurements) and noticed overruns. > > So, even plain single 'record' occasionally produces overruns: > > arecord -D hw:0,2,0 -c 2 -r 96000 -d 6 -f S32_LE recorded.wav > Recording WAVE 'recorded.wav' : Signed 32 bit Little Endian, Rate 96000 Hz, Stereo > overrun!!! (at least 855507586.521 ms long) Wow. That is a three month long overrun! Or perhaps it is a bug in arecord. You are using 96000 why? Remember that you are pumping out about 1MB/s. What is the cable-- USB cannot handle that. I would suspect something spurious is going on. (PS-- you are using 32 bit recording. You do know that there is absolutely nothing in the world that has a signal to noise ration of 180dB. In fact I suspect that you are not getting anymore than 16 bits of useful infomation per recording session. (S/N of even 90dB is pretty rare). > . > > So, my question is: "Why ?". It's a 2.6Ghz machine with SATA disks. Two cores, > web browsers are the most active tasks (nothing fancy, no sound activity on > the side of the web browsers). Effectively one core is free. > > Any ideas ? > > The gear: > > Card: HDA NVidia > Chip: Realtek ALC883 > . > > Thanks, > Sergei. > > ------------------------------------------------------------------------------ > Xperia(TM) PLAY > It's a major breakthrough. An authentic gaming > smartphone on the nation's most reliable network. > And it wants your games. > http://p.sf.net/sfu/verizon-sfdev > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------------ Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
