This is just a repo to store notes about creating a linux machine for our Dante enabled WFS system.

https://github.com/MARIAN-Digital-Audio-Electronics/MARIAN-ALSA-DRIVER

After following instructions, I saw an error that vmlinus cannot be found, but the card works despite this error/warning.

jackd start

jackd -R -p4096 -dalsa -r48000

In the initial attempt I came acros a limit built into Jack Audio Connect Kit. There is a limit in jackd, called #define DRIVER_PORT_NUM, which by default is 256. This will not work with Marian Clara E, since it has many more ports.

To change this limit:

• Download jack2 source from github.
• Change the number 256 to 1024
• remove any existing jack2 packages that are already there (also jack1, which is included with debian). I just did the rather aggresive:

sudo apt remove jack*

Which is probably not very safe thing to do, I don't recommend this, but it worked for me.

Compile jack2 by going to the jack root folder and running:

./waf configure
./waf
sudo ./waf install

You may need to install a dependency to also have the ALSA driver for Jack included otherwise you will see an error when you start jackd. You can check the build config options by doing ./waf --help

After this, you can install supercollider package as normal, it has jackd as a dependency (also qjackctl), but this doesn't override the custom jackd client in /usr/local/bin so it seems to be ok.

The WFS library can be installed as a quark and works out of the box.

Remove master server and only use WFS servers. You'll want to have as many servers as cores in the CPU.

There seems to be a problem with buffer size of UDP messages in linux. However, this buffer can be enlarged with the following command.

sudo sysctl -w net.core.rmem_max=13631488
sudo sysctl -w net.core.rmem_default=13631488

It also has the nice sideeffect of fixing the IDLE CPU rate to something more sensible.

top -n 1 -H -p

this will show actual CPU usage by all jackd threads top -H -p $(pgrep jackd)

taskset -apc 0-23 $(pgrep jackd)