On Wed, 24 Nov 2010, Grega Fajdiga wrote: > > > Na 24. 11. 2010 15:35, Bill Unruh je pisal: > >> That is probably what is called feedback.i It says yor microphone works. >> Unplug your headphones/speakers. >> Ie, turn off all output. So set both to Mic. >> Now record. Once you have recorded Turn off the inputs. and see if there is >> some recording. Or use something like audacity and look at the input meter. >> >> > > I tried turning both on and no change, I get nothing but silence > just as before. Also, the screeching is very loud and unbearable. > It doesn't occur in Win 7 though. I understand that you are making the last statement just to tell us that it is not an unsurmountable hardware fault in the sound card. Other than that it gives zero clues as to what might be wrong. The screeching is almost certainly feedback of some sort. The frequency would give an estimate of the feedback time, although it sounds like the system is limiting ( highly non-linear regime) in which case the relation between the feedback frequency and the feedback time is more problematic. So, what kind of frequency is that screech? And when it screeches, can you record it? What do you have plugged into the inputs and do you have speakers/headphones/... plugged into the outputs? You said "I tried turning both on". Since I told you to try a whole bunch of things, that "both" has no referent. I told you to turn ALL of the outputs off (pull all the sliders for the outputs to zero-- ALL Every one.). Now for the inputs select the MIC for all the inputs and push the sliders up. Plug a microphone into the input. Try recording. Does the recording level meter fluctate?. > > Thanks, > > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
