There is a Pulseaudio Jack bug in some Mint/Ubuntu distros, including Mint 14.
http://ubuntustudio.org/2013/06/pulseau ... and-12-10/
Jack won't work properly with Pulseaudio and choppy sound and other problems can occur.
http://manual.ardour.org/setting-up-you ... ntu-linux/
The solution is to disable Pulseaudio by placing a client.conf file in the /home/.pulse directory containing
autospawn = no
daemon-binary = /bin/true
or use pasuspender for temporary Pulseaudio disabling.
http://voices.canonical.com/david.henni ... our-audio/
Mint uses Pulseaudio for the system sound and disabling Pulseaudio also disables the Mint Desktop sound configuration, so Alsamixer or Gnome-Alsamixer has to be used for sound configuration instead.
Also, redirecting Pulseaudio to Jack might be another option http://askubuntu.com/questions/100862/r ... 441#290441