Create and edit track stacks in Logic Pro for iPad

You create a track stack by selecting tracks in the Tracks area. Any nonadjacent tracks move so that they are grouped together in the track stack. Both folder stacks and summing stacks can contain any combination of track types as subtracks. A folder stack can also include summing stacks as subtracks.

You can hide the subtracks of a track stack to save space and then show them in order to record or edit. You can add tracks to a track stack, remove tracks from a track stack, and reorder tracks in a track stack (reordering tracks doesn’t affect the sound).

After creating the summing stack, you can route individual subtracks to a different destination. If you do so, however, the rerouted subtracks are no longer controlled by the main track’s channel strip.

You can add, remove, and reorder subtracks, nest a track stack inside another track stack, and flatten a track stack, in which case the subtracks again become normal tracks.

When you flatten a folder stack, the main track is deleted if its Volume fader is set at 0 dB (unity gain) and it contains no automation data.
When you flatten a summing stack, the audio subgrouping is retained, unless there is no audio processing on the main track aux (no plug-ins, Volume fader set to 0 dB, Pan/Balance set to neutral, and no automation data). In this case, all subtracks (or their audio subgroups) are routed to the stereo main output, and the main track aux is deleted.

Create a track stack

In Logic Pro, tap the Multiple Select button in the Tracks area menu bar.
Select tracks you want to use as subtracks in the track stack.
Tap the Multiple Select button again to deselect it.
Tap the icon of one of the selected tracks, then do one of the following:
- To create a folder stack, tap Create Folder Stack.
- To create a summing stack, tap Create Summing Stack.
  The track stack appears in the Tracks area, with the selected tracks as subtracks.
You can drag additional tracks into the track stack to add them as subtracks.

Show or hide subtracks

In Logic Pro, tap the disclosure triangle in the track icon of the main stack.

Reorder subtracks

In Logic Pro, touch and hold the track icon for a subtrack, then drag vertically to move the subtrack up or down.

Add a track to a track stack

In Logic Pro, touch and hold a track icon, then drag the track between two subtracks in the track stack.

Remove a subtrack from a track stack

In Logic Pro, drag the subtrack outside of the track stack (below the last subtrack, or above the main track).
When you remove a subtrack from a summing stack, the track’s output routing changes from the aux used by the main track to the main outputs.

Nest a track stack inside another track stack

In Logic Pro, touch and hold the track icon of the track stack you want to nest, then drag it between two subtracks in the track stack you want to nest it inside.

Flatten a track stack

In Logic Pro, double-tap the track icon of the track stack, then tap Flatten Stack.

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Logic Pro User Guide for iPad