Hello Tobias, On Wed, Apr 21, 2010 at 10:35:58PM +0200, Tobias Grosser wrote: > I just tested the new v1.0.23 release including the Thinkpad T410s > support. I works really great, however the microphone input has > always > a white background noise. I am hearing some noise as well. I will try to look into the issue when I find the time. > I tried an external microphone as well as the internal ones. Either the > mixer is turned high enough that my voice can be heard good. In this > case there is always some background noise. If I turn the mixer (or > mic boost) down, the noise vanishes but I cannot hear myself. > > Can you give me a hint how to debug this problem? > > I already put my information here: > http://www.alsa-project.org/db/?f=6b218b5da3fcc298e6d677a3923ec66d98f996af > > Is this some input (maybe docking station) that is not disabled? Or > can I change some of the input amplifiers? I do not have access to datasheets and I am not an ALSA expert either. So I am not sure what the reason for the noise could be. Perhaps you could try adding mixers? I have read somewhere that the T410s has some sort of noise cancelation capabilities. I do not know if they are hard- or software based. Perhaps you could play with the GPIOs and see if that changes anything (e.g. enables noise cancelation). Best Regards Jens Taprogge _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
