On 01/04/2016 08:15, Ffanci Silvain wrote:

Ben Edwards, Apr 1 2016:
...

I need to use a slave.

Yes, but I haven't seen it like that, if it works though...

Is this correct?

pcm_slave.sl3 {
   pcm "hw:1,0"
   format S16_LE
   channels 2
   rate /44100 /
}
pcm.complex_convert {
   type plug
   slave sl3
}

Don't put the slashes around your sample rate. I'd normally put all the sl3 code inside your complex_converter, where you said:
slave sl3
I would have written:
slave {
    pcm "hw:1,0,0"
    ...
}

So made ~/.asoundrc

pcm_slave.sl3 {
   pcm "hw:1,0"
   channels 2
   rate 44100
}

pcm.complex_convert {
   type plug
   format S16_LE
   slave sl3
}

but got

pi@cuberadio:~ $ arecord -t wav -r 44100 -c 2 -f S16_LE -D complex_convert mon.wav
ALSA lib pcm_plug.c:1261:(_snd_pcm_plug_open) Unknown field format
arecord: main:722: audio open error: Invalid argument

;(.

| Not sure exactly what S16_LE. Cant find a list of the formats. Or is this the format of the card, not the format I want.

S16_LE = signed 16bit Little Endian, which is what you want. Take a look at the manpage for arecord:
man arecord
then search for s16_le:
/s16_le
you will come to a full list of accepted bit depth/sample formats of ALSA.

Not against using jack but only if I have to. It seems more complex and I am very new to al this.

If you have to work with the asoundrc, JACK will be easier on every modern system, that I know off. It will take care of different bit depth automatically. Maybe give it a try at some point. If you like graphical user interfaces qjackctl is a good companion to look at connections and/or make them yourself.

Its headless but I could ssh -X I guess. Ime just trying to get it to work/take the path or least resistance. Don't mind taking a couple of hours working this out but I do find the documentation for Linux stuff makes my head spin, and I worked in It for over 15 years. Ime basically now a creative, I do video production mainly. figured if I could do it without installing extra framework that would be good. I help at a local volunteer run venue/performance space, http://cubecinema.com/ (Server offline currently as it is hosted onside and power is down due to electrics needing total overall). This is what i am trying to sort out this stuff for and trying to find time to do it. OK, ime a bit lazy, my boss when I did IT said this was a good thing, it means you try to find the easiest way of doing stuff;). I wish I had a day or too to work fully through docs but its difficult to find the time.

Regards,
Ben

...

Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain

--
Ben Edwards, Video Editor/Colorist & Cameraman
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