Ardour is an multichannel audio recorder.
Ardour is an audio recorder with many features. It uses JACK to connect with audio sources.
Mixer window of Ardour
To use Ardour you need first to run JACK. If you you don't have it, Ardour will install JACK. The new entry in your menu Multimedia > JACK Control is a graphical interface to use JACK.
Limit of the maximum locked memory
When you start Ardour you may get this warning message:
WARNING: Your system has a limit for maximum amount of locked memory. This might cause Ardour to run out of memory before your system runs out of memory. You can view the memory limit with 'ulimit -l', and it is normally controlled by /etc/security/limits.conf
To avoid this you have to edit the limits.conf
sudo gedit /etc/security/limits.conf
and add this line to it
@audio - memlock unlimited
To activate this change you also have to edit /etc/pam.d/common-session:
sudo gedit /etc/pam.d/common-session
adding the line
session required pam_limits.so
Now you need to relogin and the warning message should be gone.