I believe mic boost is on by default. What model are you running this as? Laptop or Fujitsu? Tobin On Tue, 2007-09-04 at 11:14 -0300, Pablo N. Hess wrote: > I have to make the sound chip of a Itautec W7635 (= FIC VA250D) work on > a Gentoo(-based) distro (I'm now trying Sabayon). > It is a HDA-intel (Conexant codec). > > Using my earphones as a stereo mic, recording with 'arecord -f cd' has > always worked perfectly fine, from alsa-driver-1.0.14 on. > > However, when using a regular mono mic (like the ones that come in > common headsets), recording simply does *not* work. > > Here's the quick info: > > alsa-driver-1.0.14: > playback: ok > recording: > stereo mic: ok > mono mic: no input at all (very high volume already tried) > > alsa-driver-1.0.15rc1: > playback: ok (even better than with alsa-driver-1.0.14) > recording: > stereo mic: ok (seems better thatn with alsa-driver-1.0.14) > mono mic: *very* very low volume, bad quality, lots of low-volume > noise, too. > > > Now the paragraphed info: > > Playback is perfectly ok since alsa-driver-1.0.14, just like recording > with an earphone as a stereo mic. > > With alsa-driver-1.0.14, definitely no mono-mic input works, no matter > the settings at alsamixer. > With alsa-driver-1.0.15rc1, mono-mic input works very very bad > (extremely low volume, terrible quality, lots of clicks and noise). > > I guess that the mono mic needs a mic boost in alsa-driver-1.0.15rc1. > However, with a 'grep -i "mic boost" .../pci/hda/*.c' > (alsa-driver-1.0.15rc1 source code), it seems that only patch-realtek.c > and patch-analog.c support this feature. > > Is it even possible to add a mic boost feature to this codec? > > The output of alsa-info.sh with alsa-driver-1.0.15rc1 is at: > http://pastebin.ca/681023 > > Thanks a lot for any info, and congratulations to all of you for your > terrific work with ALSA. > > Pablo Hess > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel -- Tobin Davis What's page one, a preemptive strike? -- Professor Freund, Communication, Ramapo State College _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
