Subject: Re: [ecasound] Re: [Jackit-devel] Using a second device
From: Anthony (avan_AT_uwm.edu)
Date: Sat May 31 2003 - 23:38:58 EEST
* Kai Vehmanen <kai.vehmanen_AT_wakkanet.fi> [May 31 03 15:18]:
> On Fri, 30 May 2003, Anthony wrote:
>
> > This works great. I just tried:
> > ecasound jack_auto,metro -o alsa,default
> [...]
> > Maybe I don't understand jack_auto, but I would of expected to hear this
> > in the left channel, not the right.
>
> And you should. I did the same test and the metronome is on the left.Check
> the connections with "jack_lsp -c" (and you cables :)).
Indeed ;) I forgot I just rewired everything. ta.
> Anyway, the whole syntax is 'jack_auto,client'. It causes ecasound to
> register a set of JACK ports and connect those to the ports of 'client'.
> You can change the number of ports/channels registered with ecasound -f
> option:
Could you explain what is going on internally? I take it there is some
buffering going on? Can this be tweaked in the usual way? I haven't
tried anything serious with this, say routing from ardour. I suppose
you certainly want to make the samplerates match to avoid the
overhead. Anyway, great stuff as usual Kai.
--ant
> # register just one channel
> ecasound -f:32,1,44100 -i jack_auto,metro -o alsa,default
>
> # register 10 channels
> ecasound -f:32,10,44100 -i jack_auto,metro -o alsa,default
>
> By default the format is "-f:16,2,44100" (you can change this by editing
> ~/.ecasound/ecasoundrc), so ecasound registers two ports. As 'metro' only
> has one port, only the first one is connected to ecasound.
>
> PS If you leave the "_auto" out, ecasound just registers its ports,
> but doesn't make any connections.
>
> --
> http://www.eca.cx
> Audio software for Linux!
>
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