heh. thanks for the compliment. :) but i think any electric engineer, public speaker, or even someone who listens to a lot of rock music would be able to identify "unbearable high-pitch noise when I raise the volume". that's feedback. it's unmistakable, and you did a good job describing it.
it's what you get when you take the output signal and feed it back into the input. in your case, the speaker output was being input into the microphone, which was being pushed back through the speaker, which was being picked up into the microphone, which was pushed back through the speaker, etc... :) one way to deal with that is to turn off the input, meaning, either turning the mic off (disconnecting the microphone) or turning the mic level down. pete On Sun 23 Jul 06, 1:51 AM, Hai Yi <[EMAIL PROTECTED]> said: > pete, you are really good! I turned mic all the way down and the > problem is gone! Do you mind eleborating on it a little more? > > Thanks again, > Hai > > > On 7/23/06, Peter Jay Salzman <[EMAIL PROTECTED]> wrote: > >On Sun 23 Jul 06, 1:28 AM, Hai Yi <[EMAIL PROTECTED]> said: > >> hello, > >> > >> I have a problem with adjusting the volume when I watch the movie or > >> listen to the music: the sound becomes unbearable high-pitch noise > >> when I raise the volume (using alsamixer or other). > >> > >> I hope I could be able to provide more details, however, there is not > >> too much info about it. > >> > >> Anyone experience this kind of problem? > >> > >> Thanks a lot, > >> Hai > > > >Hmmm... Sounds like you might be hearing feedback. Do you have a > >microphone > >hooked up to your soundcard? If so, disconnect it. > > > >Also, use whatever mixing software you use to mute the input. For example, > >with "xmix" (am I showing my age?) turn "mic" down all the way. > > > >Pete -- The mathematics of physics has become ever more abstract, rather than more complicated. The mind of God appears to be abstract but not complicated. He also appears to like group theory. --- Tony Zee's "Fearful Symmetry" email: [EMAIL PROTECTED] web: http://www.dirac.org/p PGP Fingerprint: B9F1 6CF3 47C4 7CD8 D33E 70A9 A3B9 1945 67EA 951D _______________________________________________ vox-tech mailing list [email protected] http://lists.lugod.org/mailman/listinfo/vox-tech
