On Fri, Oct 19, 2007 at 02:44:08PM -0700, william estrada wrote: > When I use my laptop's sound device and record without a mic, I get > a file full of x'7f's. If I do the same with my cheap-o USB device > I get a file full of x'81's. The sound quality from the laptop is > unacceptable, so that is way I want to use the USB device. Those values are somewhat confusing - your device doesn't produce 8-bit samples, does it ? A 'perfect' interface would probably produce zeros on silence. You may be seeing a small DC offset. Anyway, silence detection based on one particular sample value can't be expected to work well, there will always be _some_ noise. Better calculate the RMS amplitude and set a threshold on that. -- FA Laboratorio di Acustica ed Elettroacustica Parma, Italia Lascia la spina, cogli la rosa. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
