Keep chapter names and editorial annotations in two separately named label tracks. This gives each set its own purpose and export path. On a Mac, check your Audacity version first: current Audacity 4 documentation differs from older instructions for Sync-Lock and label export.

Check which Audacity workflow applies

Audacity’s macOS download page currently lists version 4.0.1. This article uses the current Audacity 4 manual for the main workflow and identifies older behavior separately. The distinction matters because Audacity’s official transition guide says Sync-Lock has been replaced by ripple editing. Download for macOS, Audacity 3 to 4 transition guide.

The concrete task is to maintain a clean chapter list while retaining time-based editing notes in the same project. The recommended arrangement is an audio track followed by two label tracks named Chapters and Editorial Notes. These names are an organizational convention; both tracks use Audacity’s ordinary label system.

A label track contains text markers and produces no audio. Chapter marks and annotations therefore share the same underlying mechanism. Their separation comes from putting them on different tracks and choosing the appropriate track when exporting labels. Label Track Item.

Decide whether each label needs a point or a region

A point label marks one instant. A region label marks a span with a beginning and an end. Audacity’s documented label-file format represents a point with identical start and end times, while a region has different times. Label Tracks, Importing and Exporting Labels.

Use the following illustrative plan for a 90-second synthetic tone sequence. The times and text are invented practice data, not observed results. The table provides a decision rule: chapter starts identify navigation boundaries; editorial regions identify the exact stretch to inspect.

Track Start End Example text Purpose
Chapters 0 seconds 0 seconds 01 Opening tones Mark the first chapter start
Chapters 30 seconds 30 seconds 02 Alternating tones Mark the second chapter start
Chapters 60 seconds 60 seconds 03 Closing tones Mark the third chapter start
Editorial Notes 12 seconds 15 seconds Review transition Identify a stretch to inspect
Editorial Notes 42 seconds 42 seconds Check tone entry Identify one instant
Editorial Notes 72 seconds 76 seconds Compare fade lengths Identify a second review region

Choose region labels for chapters when you need explicit chapter endings, such as three ranges covering 0–30, 30–60 and 60–90 seconds. A chapter-start list and a chapter-range list answer different questions. Decide which your eventual destination needs before building the full set.

Keep instructions out of chapter names. For example, retain 02 Alternating tones as the chapter text and place Review transition in the notes track at the relevant time. This convention makes the exported chapter list useful without requiring someone to interpret editing instructions.

Create two clearly named label tracks on your Mac

Save the editable project before reorganizing it. Audacity 4 saves projects as .aup4 files, and its saving guide distinguishes the editable project from an exported audio file. Choose the computer-saving option if you want a local project. Save your project.

  1. Stop playback so labels will use your chosen cursor position or time selection.
  2. Choose Tracks → New label track twice to create the two tracks.
  3. Double-click each label track’s name and name them Chapters and Editorial Notes.
  4. Arrange them beneath the audio, with Chapters above Editorial Notes. Use the track menu’s Move track commands if necessary.

The current manual documents New label track in the Tracks menu. Renaming and reordering are available through label-track controls. You can also assign distinct colors with Track color; color is only a display property and does not change label behavior. Tracks, Label Track Item.

With playback stopped, place the cursor at the desired chapter start and use that track’s Add label button. For a note covering several seconds, select the time range first, then add the label on Editorial Notes. The button creates a point or region according to the selection; during playback, it instead uses the current playback position. Label Track Item.

Using the button on the intended track makes the destination explicit. Add one chapter and one note first, then inspect their placement before entering the remaining labels. This small check is particularly useful when both tracks are visible and contain markers near the same time.

Separate labels that are already mixed together

For a modest existing list, use a deliberate reconstruction pass. First record each label’s text, start time and end time. Then recreate it on the appropriate destination track and verify the copy before removing the original. Preserve both endpoints of a region; copying only its start would lose the duration information.

Open Edit → Label → Manage labels to review the project’s labels together. The current manual describes this as the central editor for reviewing and editing labels, also available through View → Show Label Editor. Use it to check the classification and timing of the reconstructed list. Edit.

For a larger mixed list, a text-based separation can be easier to audit. Audacity’s documented standard label format has tab-separated start time, end time and label text. Preserve those three fields when dividing an exported list into chapter and annotation files. The label editor provides import and export functions. Importing and Exporting Labels, Label Track Item.

Treat this as classification, not rewriting: every original row should belong to one intended set, and its timing should survive unchanged. Keep the original project until the separated version has been saved and reopened successfully. A clean chapter list should contain no review instructions; the notes list should retain every unfinished editing task.

Keep both label tracks aligned when editing audio

Track separation alone does not establish how later markers move after an audio edit. In Audacity 4, the official transition guide directs users to ripple-editing operations, including Delete and close gap (all tracks) and Insert and preserve sync. The old Sync-Lock Tracks switch is gone. Audacity 3 to 4 transition guide.

For a Mac, open preferences from the Audacity application menu. The Audio editing preferences page controls paste and delete behavior, including whether deletion leaves a gap or closes it. Check these settings before making edits that change the timing of later content. Edit, Audio editing.

Use a simple timing check after your first length-changing edit. In the illustrative sequence, deleting seconds 5–7 and closing that gap across the project should put the original 30-second chapter start at 28 seconds. The original 42-second note should become 40 seconds. Those numbers are arithmetic expectations for this example, not a report of a tested project.

Inspect one chapter and one note after the edit. If only the audio moved, undo immediately and review the operation’s scope. Also inspect labels inside or crossing the deleted interval: subtracting two seconds from later markers does not describe what should happen to a region whose contents were partly removed.

If you are using an older Sync-Lock workflow

The older manual documents Tracks → Sync-Lock Tracks. Its groups depend on track order: adjacent audio tracks can be followed by multiple adjacent label tracks at the bottom of the group. For this arrangement, keep the audio above both Chapters and Editorial Notes. Enabling Sync-Lock preserves alignment during subsequent supported edits; it does not repair markers that have already drifted. Sync-Locked Track Groups.

Export chapter labels without editorial annotations

In the current Audacity 4 manual, a label track’s own menu has Export labels, and the documentation explicitly says that invoking it from a particular track exports that track’s labels. Open the menu for Chapters, choose Export labels, and save the chapter file. Export Editorial Notes separately only when you need that second document. Label Track Item.

Open the resulting chapter file in a text editor and inspect it before handing it off. For the synthetic example, expect three chapter entries and no text such as Review transition. This verifies the actual deliverable rather than relying on which track looked selected.

The older manual describes a different limitation: File → Export Other → Export Labels combines multiple label tracks, and selecting one track does not restrict the export. Its documented workaround is to temporarily remove the other label tracks, export, then use undo to restore them. Keep this workaround confined to versions exhibiting that older behavior. Importing and Exporting Labels.

Exporting labels and exporting chapter audio are different tasks

The current export guide documents File → Export audio, with options for the full project, selected audio or the loop region. For individual chapter audio files, the documented selection-based path is to select each chapter’s intended range and export it using Export selected audio. A text label export is a separate operation. Export your audio, Export Menu.

Older instructions for Multiple Files use labels differently: only the uppermost label track supplies the split markers. Point labels define starts, with each file continuing to the next marker and the last continuing to the audio’s end. Region labels export their explicit spans. In that workflow, keep Chapters above Editorial Notes; otherwise annotations can become unintended file boundaries. Exporting multiple audio files.

Before finishing, save the project with both tracks intact, inspect the chapter-only text export, and check a later chapter and note against the audio. The useful result is a chapter list ready for its intended destination, alongside a complete set of editorial annotations you can continue using in the editable project.

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