![]() ![]() It determines the latency between the audio being received by JACK and being sent to the output device. The key to success with JACK is to eliminate (or at least minimize) xruns.īuffer size is measured in frames per second. Whenever this data fails to arrive in time to satisfy the requests of a JACK app it causes an xrun which is often accompanied by a disruption to the sound output. Xruns For JACK to operate smoothly and without drop-outs it requires that its buffers (the memory used to transport audio) provide a continuous stream of data. If it gets too high you may experience performance issues. Realtime scheduling allows JACK to take priority over other programs being run and hence improves performance of JACK applications.ĭSP Load is the current CPU load estimated by JACK. ![]() Realtime tells you if JACK is running with realtime scheduling or not. ![]() You cannot run any JACK-dependant software unless the JACK server is started beforehand. Server Status tells you if the JACK server is running or not. Alternately, you can manage users and groups using the graphical kuser tool which is included with 12.04.3. You will then need to log out and back in or reboot before the user will be recognised as being in the audio group. Replace with a KXStudio user name when you run that command in a terminal. ![]() You can add a user to the audio group by running: The user created during installation of KXStudio 12.04.3 is automatically added into the audio and video groups but newly created users will not be part of these groups. Being a member of the audio group is required for your user to run JACK in realtime mode for optimal performance and is also required to access FireWire devices. The other check verifies that your user is included in the audio group. This check will be ticked already if you installed from the KXStudio ISO as it includes a low latency kernel. Current kernel is a verification that you're running a realtime or lowlatency kernel. ![]()
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