Re: [ubuntu-studio-users] EQ with JACK

2017-11-29 Thread Ralf Mardorf
On Wed, 29 Nov 2017 15:45:22 -0500, Thomas Pfundt wrote:
>Is there anything similar that can be used with JACK?

No, jack is a sound server for professional purpose, it is not a plugin
host. You could start jackd by a script and automatically start
https://packages.ubuntu.com/artful/jack-rack , too, with the desired
plugin and its desired settings. Let the script restore connections by
using https://packages.ubuntu.com/artful/aj-snapshot . That's not the
only solution to your problem, but it's cumbersome to mention
alternatives, while you even didn't mention what Ubuntu release you are
using, or if you are using jackdbus. Btw. when using a GUI you indeed
need to keep the Window open, so jack-rack isn't an alternative to
calf. If you don't want a GUI, use an audio host without a GUI. Audio
apps without GUI aren't my domain, but if you want to place a GUI app to
what ever desktop and/or minimised it by any size at any position, you
could use https://packages.ubuntu.com/artful/xdotool and
https://packages.ubuntu.com/artful/wmctrl by the script to achieve this.

You could replace jackd by a wrapper, to run the script as jackd instead
of directly running jackd.

dpkg-divert --add --rename --divert /usr/bin/jackd.real /usr/bin/jackd

The above command would move /usr/bin/jackd to /usr/bin/jackd.real ,
even if you would upgrade the jackd package, it wouldn't change. You
could call the script jackd and let the script start jackd.real.
Perhaps Ubuntu Studio does something similar already, so first check if
it isn't already done.

Regards,
Ralf

-- 
$ pacman -Q linux{,-rt{,-cornflower,-pussytoes}}|awk '{print $2}'
4.14-2
4.13.13_rt5-1
4.11.12_rt16-1
4.14_rt1-1

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[ubuntu-studio-users] EQ with JACK

2017-11-29 Thread Thomas Pfundt
Hi everyone,

I just wanted to quickly ask how you solve setting up a systemwide EQ in JACK 
for audio monitoring?

There's of course the possibility of running Calf and routing the system output 
through it, but then the Calf window needs to be open constantly. Pulseaudio 
has a practical LADSPA-EQ that's set-and-forget, but of course it doesn't work 
when JACK is started (and has some other latency/performance issues).

Is there anything similar that can be used with JACK?

I'd actually just need to reduce one frequency band at around 140 Hz by 3 or 4 
dB and that's it.

Kind regards,
Thomas-- 
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