Kai, you are a hero!

Your practical advice on testing whether capture works made it so easy to
detect differences in mixer settings, that I found the magic combination! 
It now works perfectly, and my indictment of the intel8x0 driver was
completely wrong!

The "snow" I was capturing before was thanks to the IEC958 being set for
capture as well as Mic.  It seems odd that there could more than one
capture source, but that's what the UI is telling me.  Since there was no
SPDIF coming in, noise is what I got.  (This is just my deductive theory,
not based on deep knowledge.)  I'm glad I accidentally bumped the Insert
key on my keyboard to toggle Capture off on IEC958, and immediately saw
the hex bytes start to look like something meaningful.

Again, thanks to you and everyone else for putting me and my project back
on track.

I will very happily test anything where a Realtek ALC650 / intel8x0 comes
into play, and thanks particularly to Jaroslav and Takashi for their
excellent work!


All the best,
John


P.S.  Can your recipe for dumping hex from arecord be posted somewhere to
benefit others like me in the future?



Kai Vehmanen said:
> On Tue, 20 Jan 2004, John W. Cocula wrote:
>
>> represents.  But it's as if no one uses their microphone jacks at all, and
>> that capturing input is completely unimportant, compared to
>> surround-sound
>> output, for example.  I think, if this is the case, that voice-over-IP and
>> speech recognition will end up dead-on-arrival on Linux, which would be a
>> shame.
>
> Works fine here (plain recording plus full-duplex play+rec as needed by
multitrack record, fx-procesing and voip). Soundcards: various intel8x0
chipsets, cs4281, gusmax, ens1371, awe64g, ice1712, and so on.
>
>> So, can everyone plug in a microphone, try to arecord something, try to
aplay it back, and report if it worked?  I am particularly interested
in users of the intel8x0 driver.
>
> Try the following:
>
> [console 1]
> arecord -r 48000 -c 1 |hexdump
>
> [console 2]
> alsamixer
>
> .. play with the almixer settings (unmute with 'm' and change recording
source with <spacebar>), talk to the mic and see whether the flow of
hex-values reacts in anyway to the input. This is a nice way to see
whether recording works at all...
>
> --
>  http://www.eca.cx
>  Audio software for Linux!
>
>
>
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