Re: Occasional metallic sound when recording (cs46xx)

[Wilfried Weissmann <Wilfried.Weissmann@gmx.at>]

Paul Davis wrote:
>>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.
> 
> 
> its almost certainly a software problem in mythTV and gnome sound
> recorder. i've written code that does this several times - every time
> it takes me ages to figure out why, and then i can never remember when
> i do it the next time. its related to off-by-1 errors in processing
> incoming audio.

i also have the same problem with speakfreely with my cs46xx. it does 
not look like the metallic sound is triggered by any specific event 
(load, I/O,...). out of the sudden somethings goes wrong. i think i also 
experienced it with the kde sound recorder. but i have not updated the 
alsa driver for a while (still 0.9.5 or so). toggleing the ADC sounds 
like a good idea. i have not tried that yet but reloading the modules 
works too.

> 
> not necessarily, of course, just a point of view.

hmm, what makes something sound metallic anyway? echo?

bye,
wilfried




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