Hi!
Big progress here! I got my mic to work, I was able to record stuff and
I *think* that I was able to seperate left and right channel. I'm not
sure how to test it though...
Here's what I added to my asoundrc file:
pcm.recording {
type dsnoop
ipc_key 2589
slave {
pcm "hw:0,0"
format "S16_LE"
}
}
pcm.recleft {
type dsnoop
ipc_key 2589
slave {
pcm "hw:0,0"
format "S16_LE"
}
bindings.0 0
}
pcm.recright {
type dsnoop
ipc_key 2589
slave {
pcm "hw:0,0"
format "S16_LE"
}
bindings.0 1
}
It creates three devices which are dsnooped together (like dmix, but for
recording). The ipc_key is an arbitrary number, but is has to be the
same for all the three of them. I don't know whether the dsnoop plugin
is always necessary, but I think I heard that not a lot of soundcards
support "mixing" when recording (many more do mixing for playback).
As dsnoop (just like dmix) only supports a hw typed slave, I wasn't able
to chose plughw:0,0, which was much easier to use with arecord, so I had
to pick hw:0,0. When I was using arecord with hw:0,0, I had to specify
the sample format (with -f) to S16_LE, so I specified that format in my
asoundrc file, too.
Last but not least, the bindings section of the recleft device binds the
one channel to the first channel of its slave (I hope that its the left
one), and the bindings section of the recright device binds its channel
to the second of its slave. Like this (I hope), the recX devices will
only record the X channel.
If we can approve that the above setup works, I'm glad that we found the
solution so quickly and I'm looking forward to have a new article in the
wiki :-)
Regards, Ingo
Jean-Michel Pouré schrieb:
> Dear Ingo,
>
> Le mardi 13 février 2007 à 22:33 +0100, Ingo Müller a écrit :
>> First, I wanted to give HUGE thanks to you for your work you are doing
>> on the wiki! It always feels good if people are contributing a bit, so
>> I'm really happy about you doing a lot :-) If you have any idea about
>> general improvements about the wiki, I'd be glad if we could discuss
>> them.
>
> You are welcome. Whenever I discover a tool, I like to contribute to the
> corresponding wiki. It is a very nice way to learn.
>
>> About your remaining problems: I tried some recording for the first
>> time
>> sunday night, but I wasn't successfull. I don't know whether it's the
>> card, the mixer settings or the mic plugged in into the wrong plug :-P
>> I'll try to get it to work in the next couple of days and will then
>> try
>> to seperate the two channels. Maybe, we should create a new page about
>> that problem in general, so you could link to that page on the Edirol
>> UA-25 page.
>
> Good idea.
>
>> Unfortunately, I can't help you with the low-latency and midi
>> stuff :-/
>
> A new problem now: I
> cannot speak in the microphone or play a sound to digital out.
>
> Any idea?
>
> Kind regards,
> Jean-Michel
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