Editing : Beat Detective : Generating Beat Triggers : Realign Session

Realign Session
Beat Detective’s Realign Session function lets you generate Bar|Beat markers without tick-based material shifting. This is useful if you want to extrapolate Bar|Beat markers from tick-based material to align the tempo map and Bar|Beat grid to the tick-based material.
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You can also switch tick-based material, such as a MIDI performance, to be sample-based and then manually insert Bar|Beat markers.
Generating Bar|Beat markers in sessions with tick-based material, such as MIDI tracks and tick-based audio tracks, can cause the tick-based material to shift in absolute time. This can be useful if you want to align the tick-based material to Bar|Beat markers generated from sample-based material.
When you generate Bar|Beat Markers in a session that contains tick-based audio or MIDI, Beat Detective gives you the option to preserve the position of the session’s tick-based material, or to allow the material to shift.
 
To generate Bar|Beat Markers with Beat Detective in a session with tick-based tracks:
1 In the Edit window, make an audio or MIDI selection.
2 In the Beat Detective window, select Bar|Beat Marker Generation.
3 Define or capture the selection as described inDefining a Beat Detective Selection.
4 Set the Resolution to Bars or Beats.
5 Click Generate.
6 Do one of the following:
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In the Realign Session dialog, choose Preserve Tick Position if you want to let the tick-based material shift in absolute time.
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Choose Preserve Sample Position if you want to have the tick-based material maintain its absolute position. This option can be useful when adding a meter and tempo map to a freely played performance.
7 Click OK.