Reference Guide

375
Synchronizing audio and the project tempo
AudioSnap
The global project tempo map is copied to the clip tempo map so the tempo maps are identical.
See:
Editing a clip’s tempo map
Changing a project’s tempo
Using the Transient tool
Editing transient markers
Using the AudioSnap palette
Fixing timing problems in audio clips
Extracting MIDI timing information from audio
General editing
Using the Pool
Algorithms and rendering
Keyboard shortcuts
Editing a clip’s tempo map
Each audio clip has an internal tempo map, which makes it possible to synchronize the audio clip
with the project’s global tempo map (see Editing a clip’s tempo map).
SONAR automatically creates a tempo map for each audio clip. In some cases, SONAR can detect
the wrong tempo. For example, SONAR might detect a tempo of 120 BPM when the actual tempo is
240 BPM, or a beat may be mapped to the wrong transient. You can easily remap the tempo map, if
necessary.
SONAR provides a convenient graphical interface for editing a clip’s tempo map.
You should make sure a clip’s internal tempo map is correct before using any of the tempo-related
commands in the AudioSnap palette.
The following figure shows what a SONAR-generate clip tempo map might look like.
Note: AudioSnap will always attempt to find the tempo of any clip recorded or imported into
SONAR. While several possible tempos are normally generated, in some cases AudioSnap
may be unable to detect the correct tempo or may not detect a tempo at all. This can occur if
the source material is highly compressed or does not contain transient markers on all actual
beats.
If AudioSnap is unable to detect a tempo from the clip, new transient markers are inserted on each
beat corresponding to the project’s global tempo map.
If AudioSnap detects possible tempos for the clip, existing transient markers (that appear within a
defined window of the project’s beats) are reassigned to nearby beat markers on the clip’s tempo
map.