[LAU] JACK-RACK startup quicker?

Ken Restivo ken at restivo.org
Fri Jul 17 03:14:00 EDT 2009

On Thu, Jul 16, 2009 at 08:39:33PM -0400, drew Roberts wrote:
> On Thursday 16 July 2009 13:51:00 Paul Davis wrote:
> > On Thu, Jul 16, 2009 at 1:44 PM, Ken Restivo<ken at restivo.org> wrote:
> > > Any ideas how to get JACK-RACK instances to start up more quickly?
> > >
> > > I've now got 4 of the things going for my standard live keyboard setup,
> > > and it takes forever for each instance to process the entire list of
> > > LADSPA plugins present... it's kind of like waiting for GIMP start up....
> >
> > cd /usr/lib/ladspa
> > mkdir /tmp/ladspa
> > cp {comma_separated_list_of_plugins_i_want}.so $!
> > export LADSPA_PATH /tmp/ladspa
> >
> > how well this works depends on whether a host considers LADSPA_PATH as
> > a replacement for or supplement to the default search path.
> You could always do it the other way around couldn't you?
> Move the ones to don't want to a temporary location out of the normal path.
> >

Paul's thing worked perfectly. JACK-RACK apparently considers LADSPA_PATH to be a complete path and uses it exclusively. So I was able to move just the couple things I need for my live work over to a directory, and set my scripts to set LADSPA_PATH to just that directory before starting jack-rack. Since it's all in a script, my shell's LADSPA_PATH isn't mangled, and everything else still works fine. Cuts about 3 minutes off of the time it takes to set up for a gig; always a helpful thing.


More information about the Linux-audio-user mailing list