Audio loopback in linux kernel?

[Robert Olson]

At 09:26 PM 4/6/2000 -0500, Karen D. Camarda wrote:
>OK, so we got the Sound Blaster PCI/128 card, and the demo version of the
>OSS drivers. For PCI cards, the configuration program for the drivers
>(soundconfig) will only allow the card to be auto-detected, as opposed to
>selected from a list. It decides that our card is a "Sound Blaster PCI /
>Ensoniq Audio PCI97 (ES1371/ES1373)".
>
>The problem is that we are still getting the loopback, and the mute*
>variables that setup-mixer tries to alter are not there. (I can't send the
>output of ossmix right now, but I've looked at it and they're not
>there.) One of the README files that came with the drivers implies that
>they ought to be there, but they're not. Any ideas or comments?


At 08:38 PM 4/6/2000 -0600, Richard Coffey wrote:
>Along this same vein, I want to do the upgrade to the Sound Blaster Live
>Platinum or the Turtle Beach Montego II Quadzilla that we purchased.  Any
>caveats on either of these free linux drivers?


The answer to both of these queries is, I hope, ALSA plus the latest rat.

Karen, please try out the 4.2.1 version of rat per my earlier email. 
Perhaps they've fixed the mixer problem (if not we can poke them and see if 
they can check it out). If that doesn't work for you, fire up the rat and a 
Linux audio mixer. Ignore the rat sliders and use the mixer to set the line 
level to zero, and adjust input gain with the mixer.

Richard, I worry about non-support of the Aureal chip in teh Montego. 
SBLive is pretty well supported under ALSA.

I'm aiming to switch the two ANL nodes over to ALSA machines next week (or 
tomorrow if I'm really moving well). Hopefully things will go well and we 
can start shifting other sites as well. Part of the motivation is the 
ability then to support cards like the Midiman Delta, multiport card with 
external analog to digital conversion for hopefully much cleaner audio.

http://www.midiman.com/Html/products/delta66.html

--bob
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