On Tue, 15 Jan 2008 10:43:53 +0100 Paolo Saggese <pmsa4-alsa@xxxxxxxx> wrote: > On Tuesday 15 January 2008 01:40, Tom Enderlin wrote: > > > Tried moving all the mic and mic boost sliders in alsamixer to their max > > settings and it still didn't record any audio, just background static. > > I also use Debian. Some time ago, after some upgrade I have experienced > similar problems with the mic which "mysteriously" stopped working... > > I eventually discovered that the problem was related (as already suggested > by others) to mic power. It looks like previous version of kernel/ALSA did > enable some "standard" mic power by default, while newer versions do -at > least with some hardware- provide a direct control for that. Unfortunately, > it looks like the default behavior have changed, leading to our troubles. > > In my desktop system (which use an Intel MB with ICH5 audio chipset), ALSA > mixer provides a "V_REFOUT" slider... that was it... try and see if you can > find it (or something similar). > > BTW: in my mixer I have 4 options (values) for it: > > High-Z > 3.7 V > 2.25 V > 0 V > > while the last 3 are quite obvious (though I don't know which is the "right" > setting for "standard" mics, mine works with either 3.7 o 2.25 volts) I have > no idea what does the first one means. Does it provides any voltage? What are > the differences with the others? > > If someone has some more info, please advice... I'm a curious one. 8:-) > > > Ciao, > Paolo. High-Z means high impedance, i.e. effectively unconneted. In this context "0 V" should mean "connected to ground and thus giving 0V". Regards, Sergei. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
