On Friday 05 September 2008 4:28:58 pm you wrote: > At Fri, 5 Sep 2008 02:46:50 +1000, > > Travis Place wrote: > > Hello everyone, > > > > Im Travis (wishie) once of the many helpers who man the unofficial #alsa > > on freenode irc network.. I usually spend my time fixing other peoples > > sound issues, but now i have my own. > > > > I have a HP DV2839TX laptop, and i get ALOT of static when recording via > > the inbuilt mic. Also, the mic controls are very strange.. I have (in the > > Capture section of alsamixer).. Digital, Docking Mic, External Mic, > > Internal Mic.. only the "Digital" control seems to effect my recording > > volume at all. > > The "Digital Capture Volume" is alsa-lib softvol plugin element, and > works globally. In the case of a digital mic (i.e. usually without a > volume control), sometimes this is the only effective control. > > > Strangely, though, the '* Mic' controls in the PLAYBACK section of > > alsamixer do change the recording properties somewhat (volume being the > > main factor). > > If you mean about "Mic Boost" or such, then it's a known > (long-standing) bug in ALSA mixer interface. This appears twice, for > playback and capture, but only the playback one works. There is no "Mic Boost" that i can see in either section of alsamixer. There are only the "Docking/External/Internal Mic" controls. Which, in the CAPTURE section of alsamixer, do nothing. In the PLAYBACK section, the 'External Mic' control seems to adjust gain/volume. But im using the INTERNAL mic that this laptop has. So something very strange is going on. > > > In any event, i get a rather large amount of static, no matter what mixer > > settings i try. This isnt a problem in the 'other' OS. > > > > My alsa-info.sh output for alsa-driver 1.0.16 is at : > > http://www.alsa-project.org/db/?f=0d1df6446ff1c71ad305e7b7b367f0a6b22b80c > >8 > > > > My alsa-info.sh output for alsa-driver 1.0.18rc1 is at : > > http://www.alsa-project.org/db/?f=9e5cd99f4822e0d671866fa630698bd1b0cd954 > >b > > It did work on 1.0.16 or not? Mic capture as such, works on 1.0.16 and above, but with ALOT of static in the recording. Attached is a 5 second test recording. > > > Takashi
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