At Tue, 17 Mar 2009 11:47:55 +0100, Andreas Mohr wrote:
On Tue, Mar 17, 2009 at 11:38:45AM +0100, Andreas Mohr wrote:
NOPE. Aspire One most definitely has a Fortemedia SAM (small array microphone) due to this output: http://sites.google.com/site/kengell/acer-aspire-one---dmesg
" ... ForteMedia SAM-Soft Library Loaded!
ALC INIT ... "
I had already wanted to add the mention of Fortemedia as microphone manufacturer (forgot this last time), then I researched more and found it.
Fortemedia device names include FM2018-380, not sure yet which one is in Aspire One.
http://www.fortemedia.com/products/index.htm ( especially http://www.fortemedia.com/products/fm1182.htm )
http://www.wpgholdings.com/event/S/SACg_04_ForteMedia_SAM.pdf mentions "FM201x" and www.sacg.com.tw (this one could be useful!). Searching Google "FM201[0-9] Fortemedia" comes up with FM2010 and FM2018 and thus http://www.hengdasheng.com.cn/uploadfile/391/cfile/2008102414057847.pdf which is a relatively informative datasheet.
I'm not sure whether FM2018 is on a netbook. Rather my guess is it's a digital-mic component by FortMedia together with their software library for SAM handling.
BTW, a simple "fix" for the mono capture problem, you can patch the config file for HD-audio in alsa-lib like below. Then the first channel will be used for mono capture instead of averages. Give it a try.
(But, this won't fix programs that prefer "hw" access such as pulseaudio, of course.)
Takashi
--- diff --git a/src/conf/cards/HDA-Intel.conf b/src/conf/cards/HDA-Intel.conf index 800281e..d3ac002 100644 --- a/src/conf/cards/HDA-Intel.conf +++ b/src/conf/cards/HDA-Intel.conf @@ -57,6 +57,8 @@ HDA-Intel.pcm.default { max_dB 30.0 resolution 121 } + # to avoid possible phase inversions with digital mics + route_policy copy } hint.device 0 }