[LAU] Running the guitarix LADSPA plugins on a headless system

[Jeremy Jongepier]

On 02/15/2013 10:48 PM, Sean Bolton wrote:
> 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
>

Hi Sean,

Thanks! Didn't think about that while I've used jack-dssi-host on 
several other occasions. I'll give it a whirl!

Jeremy