Re: [LAD] First release of zita-ajbridge

On 03/20/2012 10:08 AM, Lorenzo Sutton wrote:
> On 19/03/12 20:51, Fons Adriaensen wrote:
> [...]
>> (meanwhile I'm back home, the loopback device is hw:3 here)
>>
>> [terminal 1]
>>
>> fons@email-addr-hidden:/audio/audiofiles/tracks> mplayer -ao alsa:device=hw=3.1
>> diana-krall-almost-blue-44.wav
> [...]
>> [terminal 2]
>>
>> fons@email-addr-hidden:~> zita-a2j -d hw:3,0 -r 44100
>> Starting synchronisation
>>
>> /me makes connections in qjackctl and hears lovely piano intro...
> [...]
>
> If I understood everything correctly you *still* need to set up your
> .asoundrc with the jack plugin to have this working right?

~/.asoundrc: yes[1], jack-plugin:no

http://alsa.opensrc.org/Jack_and_Loopback_device_as_Alsa-to-Jack_bridge

you use the alsa loopback-device instead of the jack-plugin.

Since the "snd-loop" kernel-module is a fully-fledged alsa-device,
application support is in general much better than with the jack-plugin;
however you will have alsa_in/out (or zita-a2j/j2a) running all the time
to bridge the loopback-device to jack (depending on resampling- quality
and CPU it uses 1-3% CPU and eats up a bit more of a laptop's battery).

best,
robin

[1] the .asoundrc is only used to set the default output to the loopback
and to allow concurrent access of alsa-clients to it. It's not required
(you could configure most alsa-clients to directly output to the
loopback-[sub]devices), but handy.

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Received on Tue Mar 20 12:15:02 2012