At Fri, 22 Sep 2006 13:23:55 +0900, Junji Umeno wrote: > > Clemens, thanks for you comment to see may poor understandings. > > I thought pcm means virtual interfaces; > > $cat /proc/asound/pcm > 00-00: Intel ICH : Intel 82801DB-ICH4 : playback 1 : capture 1 > 00-01: Intel ICH - MIC ADC : Intel 82801DB-ICH4 - MIC ADC : capture 1 > 00-02: Intel ICH - MIC2 ADC : Intel 82801DB-ICH4 - MIC2 ADC : capture 1 > 00-03: Intel ICH - ADC2 : Intel 82801DB-ICH4 - ADC2 : capture 1 > 00-04: Intel ICH - IEC958 : Intel 82801DB-ICH4 - IEC958 : playback 1 > > So, what does ADC2 means ? > I don't understand what these interfaces are mapped to well. > Because the AC97 codec (Analog Devices AD1981B) seems to have two ADC circits, each left or right, > so the two ADC were thought to be mapped with each ADC/ADC2 in the alsa mapping. No. It's one ADC for a stereo stream. You cannot control the channels separately. ICH controller is designed to be accessible to multiple ADCs, typically for multiple codec chips. But most boards have only a single chip, the device #1-#3 are usually just placeholders. Takashi ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
