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Overview of Flex Time and Pitch in Logic Pro for Mac

Flex Time—similar to what is often referred to as elastic audio in other applications—simplifies the process of editing the timing of notes, beats, and other events in audio regions. You can choose a Flex Time algorithm in the Track inspector that fits best with the type of audio material you’re working with. You can match a region to the project tempo, quantize an audio performance, or compress or expand the time between specified events in an audio region without the need for trimming, moving, nudging, or crossfading.

You can edit the timing of notes and beats in audio regions using flex markers. When you record or import audio, the contents of the audio track are analyzed for transients, or significant peaks, and any detected transients are marked in the audio regions. You can add a flex marker at a specific part of the waveform you want to edit. After adding flex markers to an audio region, you use them to time stretch—compress or expand—the audio material.

Flex Pitch allows you to quantize and edit the pitch of audio material. You edit the pitch of audio material by choosing the Flex Pitch algorithm. The contents of the audio track are analyzed for pitch using a pitch detection process, and the results are plotted on a pitch curve.

You can edit the timing of audio in the Tracks area and the pitch in the Audio Track Editor. You can also extract MIDI from audio using Flex Pitch in Logic Pro.

Note: Flex Time is integrated with Smart Tempo. Using the Smart Tempo pop-up menu in the Region inspector, you can change how Flex Time and Smart Tempo adjust each region on a flex-activated track. See Choose the Smart Tempo setting.

Turn on flex in the Tracks area

  1. In Logic Pro, do one of the following to show the flex parameters:

    • Choose Edit > Show Flex Pitch/Time from the Tracks area menu bar (or press Command-F).

    • Click the Show/Hide Flex button  in the Tracks area menu bar.

    A Track Flex button and Flex Mode pop-up menu appear in the track header of each audio track.

    Figure. Flex button and Flex Mode pop-up menu in an audio track header.
  2. Click the Track Flex button  in the track header of the audio track you want to edit.

    In the Tracks area, the regions on your track now display transient markers inside the waveform as shown in the figure above. In the Track inspector, the Flex Mode pop-up menu is now available for use.

  3. Choose Flex Pitch or one of the Flex Time algorithms from the Flex Mode pop-up menu.

    Figure. Showing the Flex Mode pop-up menu open.

Turn on flex in the Audio Track Editor

  1. In Logic Pro, open the Audio Track Editor by doing one of the following:

    • Select an audio track in the Tracks area, then choose View > Show Editors.

    • Select an audio track in the Tracks area, then click the Editors button  in the control bar.

    • Double-click an audio region.

  2. Click the Show/Hide Flex button  in the Audio Track Editor menu bar (or press Command-F).

    Note: Click the Audio Track Editor’s workspace before using the key command, to make sure that the Audio Track Editor has key focus.

    A dialog window asks if you want to turn on flex for the selected track, if it’s not already on. A Flex Mode pop-up menu appears to the right of the Show/Hide Flex button in the Audio Track Editor menu bar.

  3. Choose Flex Pitch or one of the Flex Time algorithms from the Flex Mode pop-up menu.

    Figure. Flex Mode pop-up menu open.

Assign the same flex algorithm to all audio tracks

  • In the Logic Pro Tracks area or Audio Track Editor, press and hold Shift while choosing a flex algorithm from the Flex Mode pop-up menu.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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