The Analog Devices multichannel AC '97 CODECs are configured in ALSA to use ADI Compatibility Mode (aka AC '97 No Compatibility Mode). Because of this, the function of some "Playback" controls differ from the AC '97 standard. I propose renaming the controls to more closely match their function. If no one objects, I will prepare a patch for this. Details follow: (For each table I will identify the controls using the default AC '97 names.) Standard AC '97 control functions: Master - Front pin attenuation Headphone - Headphone pin attenuation PCM - Multichannel DAC level Surround - Surround pin attenuation Center - Center pin attenuation LFE - LFE pin attenuation Names currently assigned for the AD1888, AD1980 and AD1985 CODECs (the AD1986 currently uses the default names): Master - Master Surround Headphone - Master PCM - PCM Surround - Surround Center - Center LFE - LFE ADI function for AD1888, AD1980 and AD1985 CODECs: Master - Front, Center and LFE pin attenuation Headphone - Surround or Headphone pin attenuation (These CODECs have shared pins that are used for either Surround or Headphone) PCM - Front channel DAC level Surround - Surround channel DAC level Center - Center channel DAC level LFE - LFE channel DAC level ADI function for AD1986 CODEC: Master - Multichannel pin attenuation Headphone - Headphone pin attenuation PCM - Front channel DAC level Surround - Surround channel DAC level Center - Center channel DAC level LFE - LFE channel DAC level Proposed control names for AD1888, AD1980 and AD1985 CODECs: Master - Master (Front, Center and LFE) Headphone - Surround or Headphone PCM - PCM Front Surround - PCM Surround Center - PCM Center LFE - PCM LFE Proposed control names for AD1986 CODEC: Master - Master Multichannel Headphone - Headphone PCM - PCM Front Surround - PCM Surround Center - PCM Center LFE - PCM LFE Randy Cushman ------------------------------------------------------------------------- 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
