Hi, I am sorry for the little off-topic message, but I have asked in the pertinent lists and haven't received any good responses so far. I am having occasional metallic sound when recording video from a bttv-based TV tuner card. I sent the message below to the alsa-devel mailing list but no luck so far. The audio output from the TV tuner goes into my sound card's line-in input. When I get the metallic sound, if I increase the volume of the line-in channel, I hear clear sound, which confirms that the problem is unrelated to the bttv-based card. The problem is that the applications I am using (MythTV, for example) rely on recorded audio (as opposed to by-passed audio.) No problem with applications like tvtime, which don't touch sound at all. Has anyone experienced similar problems? Thanks! Eloy.- ---------------- Original Message to alsa-devel ---------------- Date: Wed, 22 Oct 2003 12:22:19 -0400 To: alsa-devel@xxxxxxxxxxxxxxxxxxxxx Subject: Occasional metallic sound when recording (cs46xx) 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. This problem happens randomly but is very annoying, specially if I program my PVR (MythTV) to automatically record a show - the show can get recorded with metallic sound, which makes it very hard to understand during playback. This is not MythTV-specific since I have been able to reproduce the problem using other applications, like the Gnome sound recorder. It is unrelated to full-duplex operation since when recording a show MythTV doesn't open /dev/dsp for writing. I really have no idea about how to troubleshoot this. I don't think the problem is hardware, but is driver-related instead. Any suggestions? Are there any debug switches I can enable to get more information about the problem? I can recompile the drivers and try anything. I really want to see this fixed, so if anyone has any ideas to try just let me know. -----------------------------------------------------------------
