[ardour-users] Unable to add more tracks

[Wolfgang Woehl]

Mark Knecht <markknecht at gmail.com>:
> Wolfgang Woehl <tito at rumford.de> wrote:
> > Mark Knecht <markknecht at gmail.com>:
> > > Hi,
> > >    I have a very modest session with 9 stereo tracks. When I
> > > attempt to add a 10th track I get the following messages:
> > >
> > > [ERROR]: IO: cannot register input port Audio 10/in 1
> > > [ERROR]: cannot configure 2 in/2 out configuration for new audio
> > > track
> > >
> > > and then Ardour adds a mono track.
> >
> > Try increasing the -p value given to jackd (not the -p given to the
> > alsa backend), that's "Port Maximum" and shows up on qjackctl's
> > setup page.
>
> will try when I got booted up. However I think it's currently set to
> something like 2. Why would this limit me to 9 stereo tracks?

Erm, the default in qjackctl is 128, and this is about *jackd's* -p 
option (*not* the alsa backend -p option). It increases the amount of 
memory jackd allocates for ports. Looks like

/usr/local/bin/jackstart -R -p512 -dalsa -dhw:0 -r48000 -p1024 -n2
                            ^^^^^
Wolfgang