24.1. MANAGING THE CPU LOAD 344
change.
24.1.2 CPU Load from Tracks and Devices
Generally, every track and device being used in Live incurs some amount of CPU load.
However, Live is smart and avoids wasting CPU cycles on tracks and devices that do not
contribute anything useful.
For example, dragging devices into a Live Set that is not running does not signicantly
increase the CPU load. The load increases only as you start playing clips or feed audio into
the effects. When there is no incoming audio, the effects are deactivated until they are
needed again. (If the effect produces a tail, like reverbs and delays, deactivation occurs
only after all calculations are complete.)
While this scheme is very effective at reducing the average CPU load of a Live Set, it cannot
reduce the peak load. To make sure your Live Set plays back continuously, even under
the most intense conditions, play back a clip in every track simultaneously, with all devices
enabled.
24.1.3 Track Freeze
Live's Freeze Track command, available from the Edit menu, can greatly help in managing
the CPU load incurred by devices and clip settings. When you select a track and execute
the Freeze command, Live will create a sample le for each clip in the track, calculating and
freezing the contribution of devices and clip parameters. Thereafter, clips in the track will
simply play back their freeze samples rather than repeatedly calculating processor-intensive
device and clip settings in real time.
Most device and clip features in frozen tracks are not accessible. However, launching clips
can still be done freely, and mixer controls such as volume, pan and the sends are still
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