Pro Tools applies groove templates relative to the song start. For example, a two-bar groove template repeats starting at every odd-numbered bar in the session (bar 1, 3, 5, 7…).
If a two-bar groove template is applied to a selection of one bar of the same meter, only the first bar of the template is used. If the selection does not encompass bar boundaries, for example 1|2|000 to 2|1|000, the groove template only modifies the selected notes.
If a selection starts on an even bar, only the appropriate portion of the groove template will be used. For example, if the selection is two bars long and starts on an even bar, the template applies bar 2 before bar 1.
In cases where the Groove Templates and track selections are based on different meters, the template will be repeated or truncated to match the number of beats in the selection.
For example, if the Groove Template contains fewer beats than the selection, such as a one-bar template in 6/8 being applied to a one-bar selection in 4/4, the template repeats to make up the difference.
If the Groove Template contains more beats than the selection on a track, such as a one-bar template in 6/4 being applied to a two-bar selection in 4/4, only uses the appropriate number of beats.
If the selection contains mixed meters, the groove template will always be mapped so that the downbeats are aligned. For example, if the Groove Template consists of one-bar of 4/4 and it is being applied to a selection of one-bar of 4/4 followed by a bar of 7/16 and one-bar of 5/8, the downbeat of the Groove Template is aligned with the downbeats in the selection and only uses the appropriate number of beats from the Groove Template.