MantrikaTools

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Segment (Audio Segment Switching) Actions ​

Segment lets an Item switch between multiple sound segments like a sampler.

The tool analyzes the source audio and splits it into several Segments — for example, a recording of five footsteps is detected as five Segments. After detection, this segment data is stored on the Item (travels with the Item), and subsequent switching / randomization / splitting / restoring all use this data.

The full Segment toolkit includes: first use Enable to analyze and activate, then use Next / Previous to switch between segments, Random for random switching, Dynamic Split to split all segments into independent Items, or Restore to fully revert.

Common notes: Unless otherwise stated, each action does nothing if no Item is selected; when multiple Items are processed together, each Item is handled independently; each execution is one Undo. Except for Enable / Restore, if an Item has not been analyzed yet, the action will automatically analyze it first before executing.

Enable and Analyze ​

REAPER Action List display name: Assistants - Segment - Enable Multi-Segment Switching

This is the entry point to the Segment toolkit — analyze first, then you can use Next / Previous / Random to switch.

After execution, for each selected Item:

  1. Performs an audio analysis (cached; repeated execution will not re-run)
  2. Trims the Item geometry to the shape of Segment 0 — you’ll see the Item immediately shrink to only the first segment
  3. Applies default Fade In 1 ms / Fade Out 50 ms to avoid clicks

Notes:

  • Repeating Enable on the same Item will not re-analyze; to force re-detection, Restore first, then Enable.

Switch to Next Segment ​

REAPER Action List display name: Assistants - Segment - Switch to Next Segment

Switches the selected Item to the next Segment (wraps around; the last loops back to the first).

For each selected Item:

  1. Automatically determines which segment the Item is currently showing based on its geometry
  2. Switches to (current segment + 1) % total segments — at the last segment it wraps back to the first
  3. Item geometry changes to the new segment shape; fade settings are preserved

Notes:

  • Does nothing if there is only 1 segment or detection failed
  • For the opposite direction use Switch to Previous Segment; to jump randomly use Switch to Random Segment

Switch to Previous Segment ​

REAPER Action List display name: Assistants - Segment - Switch to Previous Segment

Switches the selected Item to the previous Segment (wraps around; the first jumps to the last).

For each selected Item:

  1. Automatically determines which segment the Item is currently showing based on its geometry
  2. Switches to (current segment - 1) — when already at the first segment, it wraps to the last segment
  3. Item geometry changes to the new segment shape; fade settings are preserved

Notes:

  • Does nothing if there is only 1 segment or detection failed

Random Switch (Transient-Aware) ​

REAPER Action List display name: Assistants - Segment - Switch to Random Segment (transient-aware)

Randomly switches the selected Item to another Segment, with transient alignment — the new segment’s start is aligned to the transient position of the old segment, so the switch sounds natural.

For each selected Item:

  1. Randomly picks a different segment from the current one
  2. Transient alignment: if the current segment contains visible transient points, the new segment is positioned so its transient aligns to the timeline position of the old segment’s transient — preserving the rhythmic feel
  3. Item changes to the new segment shape; fade settings are preserved

Notes:

  • Does nothing if there is only 1 segment
  • Repeated execution keeps giving you different segments

Dynamic Split (Split Segments into Independent Items) ​

REAPER Action List display name: Assistants - Segment - Dynamic Split

Cuts the selected Item at each detected Segment boundary into multiple independent Items, one per segment; silent gaps between segments are deleted.

Similar to REAPER’s built-in Dynamic Split, but uses Segment boundaries (with energy anchors and transient detection).

For each selected Item:

  1. Uses Segment data to find all segment boundaries within the Item’s currently visible range (cached if already analyzed; otherwise automatically runs analysis once)
  2. Splits the Item at each boundary, producing a series of new Items
  3. Checks whether each piece’s center point falls inside a Segment:
    • Inside → keep (this is a valid Segment Item)
    • Outside (indicates silence between segments) → delete

Finally you get a clean chain of Segment Items; the original Item’s source audio, fades, and other settings are correctly inherited by each segment.

Use cases:

  • Cut a long recording of “5 footsteps” into 5 independent Items for individual volume / position adjustment or reuse
  • Prepare for randomized triggering: after splitting, send directly to tools like Macro Control / Qi for batch randomization

Notes:

  • Does nothing if there are no segments in the current visible range

Restore Original Item ​

REAPER Action List display name: Assistants - Segment - Restore Original Item

Fully restores a Segment-processed Item to its original pre-analysis state — clears Segment data, restores geometry, and removes the automatically added fades.

For each selected Item:

  1. Clears Segment data (all segment information recorded on the Item is erased)
  2. Restores original geometry — Item length / start offset return to pre-analysis values
  3. Clears Fade In / Fade Out (even values you manually changed later will be cleared)
  4. Clears Reverse Fold state (if previously processed with Reverse Items with Fold Effect)

When to use:

  • You no longer want Segment switching and want to return to a normal Item
  • Segment detection did not split ideally and you want to clear and re-Enable (re-analyze)
  • You also want to clean up prior Reverse Fold processing

Notes:

  • ⚠️ This clears fades, including values you manually adjusted later — if you care, note the fade values beforehand, or rely on Undo to revert.