On Wed, 2003-10-22 at 09:22, Eloy A. Paris wrote: > Hello, > > I am trying to troubleshoot a very annoying problem I have with a Santa > Cruz Turtle Beach (cs46xx). Sometimes, when recording, the recorded > sound is very metallic. If when I get the metallic sound I run alsamixer > and toggle the capture facility of the ADC on and off, sound is fixed > and back to normal. >
My personal experience (not with ALSA, but other things) is that you can get a horrid metallic sound when a signal is mixed with itself with a small (a few samples) delay. So, this could be some sort of out by one error causing the signal to get mixed with a delayed version of itself. The other option that occurs to me is that perhaps there is a routing problem with the signals - ie... an audio output is being "monitored" and mixed back into the input. I have found it very easy to do this with some applications with the ALSA drivers - they unintentionally produce an output which gets mixed back into the input. The solution is to mute all the stuff you don't want using alsamixer. A good thing to try would be to set up GnomeMeeting on your alsa card. It has a test mode that makes it easy to tell if you are getting an unintentional loopback. Hope this helps, Ray ------------------------------------------------------- This SF.net email is sponsored by: The SF.net Donation Program. Do you like what SourceForge.net is doing for the Open Source Community? Make a contribution, and help us add new features and functionality. Click here: http://sourceforge.net/donate/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
