15 Feb
2013
15 Feb
'13
10:48 p.m.
Hi Jeremy,
On Fri Feb 15 2013, Jeremy Jongepier wrote:
I'm trying to figure out what is the best way to
use the Guitarix-Amp
and Guitarix-FX LADSPA plugins on a headless system (read Raspberry
Pi). I've tried it with Ecasound but it already consumes more CPU
than the guitarix application itself! So I'm obviously doing
something wrong. Maybe this is because the Guitarix-Amp plugin has
one input and two outputs, read something about Ecasound starting up
multiple instances of the plugin in such a case which is not what I
want. So any hints or tips on getting this to run smoothly? I can use
either JACK or ALSA directly. I prefer using JACK, somehow using bare
ALSA produces large amounts of xruns.
How about jack-dssi-host?
$ DSSI_PATH=/usr/lib/ladspa jack-dssi-host guitarix_amp.so
jack-dssi-host will then print out (among other things) its OSC path. Use this path with
dssi_osc_send to set the plugin parameters (append '/control' to the path):
$ dssi_osc_send
osc.udp://youraddresshere.com:13160/dssi/guitarix_amp/guitarix_amp/chan00/control 5 -20
which sets control port 5 to -20. You can query the current state of the plugin:
$ dssi_osc_update
osc.udp://youraddresshere.com:13160/dssi/guitarix_amp/guitarix_amp/chan00
and don't forget analyseplugin to get the port numbers. HTH,
-Sean