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<blockquote type=cite cite>When line is non-zero, I can still hear
myself, but when I set it<br>
to zero, there's no evidence that I'm transmitting anything. Does
that<br>
make sense? </blockquote><br>
It does. The Crystal audio gear you've got may be AC97 compliant. AC97
specifies among other things the on-board mixer configuration. (see
<a href="http://www.ece.utexas.edu/~kettler/lecture2/sld040.htm" eudora="autourl">http://www.ece.utexas.edu/~kettler/lecture2/sld040.htm</a>
for a block diagram). In this mixer, the line level adjustment only changes the level of the path from line in to line out. Capture gain is adjusted with the Input Gain adjustment on the mixer. This shows up as the igain control on the OSS mixer.<br>
<br>
Unfortunately, I don't think that rat is using that as the line in gain selector in the app. The workaround would be to run a separate mixer app and use that to control gains. This is something that the ALSA rat knows about and compensates for ...<br>
<br>
<blockquote type=cite cite>Interestingly, rat resets line when I start to transmit, so I<br>
have to reset it, but in any case the whole system doesn't seem to work<br>
with this sound card. We've just ordered the Soundblaster PCI/128 card -<br>
hopefully it will arrive sometime this week. (Do you realize that that<br>
card is becoming hard to find?)</blockquote><br>
<br>
Yup. An alternative is the Creative Ensoniq AudioPCI. However, I think this is also an AC97 card, so it may have the same problems the crystal card.<br>
<br>
--bob</html>