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