MESSAGE
| DATE | 2002-06-25 |
| FROM | Marco Scoffier
|
| SUBJECT | Re: [hangout] Fwd: Re: Radio Show Issues [wynkoop@wynn.com]
|
Hey Brett thanks for the input,
> On 2002.06.24 16:58 wynkoop-at-wynn.com wrote:
> The solutions are:
>
> 1. connect line level outputs to line level inputs
Line level inputs are hot. I think this is the type of plug which accepts
both levels set through a fader called mic boost in the software mixer,
but on this setup the software mixer levels don't control anything, I've
run the other shows with _all_ the mixers (both OSS and ALSA) at zero.
Still the sound goes right from input to output as though it were hard
wired. There is the middle plug which sometimes serves as both line in and
rear speaker out, but I never got sound in from it. I should calmly go
through this yet again. Perhaps there is the magic mixer setting through
which one of the other plugs becomes line-in, but I went though multiple
combinations and did not find it.
Also this card's sampling rate is 32000, but this would change in
uncontrolable ways. All of the ready built radiocast frontends would get
confused by this which is why we had so many chipmunk and darth vader
problems at the beginning. Everytime I got one of these I would get a
glowering exasperated look from Ruben, you can imagine my joy at trying to
figure out this randomness.
I am now using a program which I know can control the sampling rate of the
card, and a bunch of pipes and fifos to encoders and the connections to
the icecast server. This is not the first time I have seen intel i810 or
AC97 randomness. Other times when I encountered cards with such
undocumented randomness, I gave up and bought a midiman delta :) Real line
inputs !! They don't even try to fudge a mic preamp on such a tiny
card. (Did I mention that I hate on-board sound cards and have been
incredibly happy with the investment I made to buy a product actually
built to get high quality sound into the machine and not just soudn in as
an afterthought ? I mean how much to you pay for graphics cards ? )
>
> 2. connect mic level outputs to mic level inputs
Mic level as you know doesn't mean much except that it is weaker than line
and should be controled through gain controls on a preamp. The software
control of this card does not allow this right now.
> 3. use an attenuater to match line out to mic in
We have a mixer to get mic levels to line levels why would we want to
bring them back down with more hardware?
> 4. properly set output level from mixer.
The tape out of the mixer cannot be set. I assume -10db (1Vpp ?) not +4db
(pro level) but this may be wrong.
>
> 5. place an attenuator between the mixer and the sound card input.
I would prefer to buying a sound card to this soln. I don't understand why
you insist on using the onboard one. Alsa picks up two soundcards just
fine, or you can disable the first in the bios.
I will take a deep breath and attack this soundcard problem one more
time. Sometimes with Ruben breathing down my neck, I don' t see so
clearly. Which is why so many problems seem to fix themselves magically
when I get home :)
--marco
--
Insist on using free media formats.
____________________________
New Yorker Linux Users Scene
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