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Audio Channels When Copying and Pasting Audio Clips
Copying and pasting audio has one other consideration. If you’re force pasting a clip into a different track, the track you solo the Auto Select control of could possibly be set to an audio channel mapping that doesn’t match the clips you’re pasting there. An example of when this would happen is if you copy stereo audio clips from a stereo track and paste them to a mono audio track.
DaVinci Resolve allows you to do this, so you have the freedom of pasting audio clips to any track you want to. However, extra audio channels within clips that exceed the number of channels supported by the audio track they’re on will be muted. Fortunately, this situation is easy to rectify. Simply right-click the track header of the problem audio track, and use the Change Track Type To submenu to change its channel mapping to one more appropriate to the clips you’ve pasted into it.
Auto Align Clips
Auto Align Clips slides one or more selected clips to align with the timecode or audio waveforms of another clip that has matching timecode or audio. This function works for video clips, which can be aligned using timecode, and for audio clips, which can be aligned using either timecode or waveform matching. Waveform matching can also be used if you’re working with audio/video clips.
You can only select one clip per video or audio track to align, and they all will align to whichever clip is on the lowest-numbered video or audio track. Clips selected that have no overlapping timecode or audio waveform will not be moved and left in their original position on the Timeline.
For example, clip A on track V1 overlaps with clip B on track V2, but not with clip C on track V3, or clip D on track V4. Selecting all clips and using Auto Align Edits will slide clip B to align with clip A, but clips C and D won’t be moved because they don’t overlap with clip A.
The original Timeline with clip A (blue) and clip B (orange) that have some overlapping audio but are out of sync
The same Timeline after the Auto Align command; clip B (orange) has been slipped to sync via audio waveform with clip A (blue). Clips C (tan) and D (green) were also selected, but because they had no overlapping timecode or audio, they remained in place.
In another example, clip A on track V1 overlaps with clips B, C, and D on tracks V2, V3, and V4 respectively. Selecting all clips and using Auto Align Edits will slide clips B, C, and D to be aligned with clip A.
The original Timeline with clip A (blue), and clip B (orange), C (tan), and D (green) all have overlapping audio, but are out of sync.
The same timeline after the Auto Align command. All clips are now in sync and the audio waveforms now all match. All the other clips moved to clip A’s (blue) position because it was the lowest clip on the Timeline.