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When Looping/Repeat not works in MIDI Editor in Reaper?


IN midi editor I created time selection and turn on repeat to listen a part again and again but it doesn't working edit cursor is not stopping ?

Ah — I see what’s happening.
You made a time selection in the MIDI editor and turned on repeat, but REAPER isn’t looping it.

That’s because REAPER’s repeat/loop playback works from the arrange view’s time selection, not from the MIDI editor’s local selection.
The MIDI editor can have its own independent selection that doesn’t control the main playback unless they’re linked.

Two ways to make your loop work:

Option 1 – Link MIDI editor time selection to arrange view

  1. In the MIDI editor, go to Options.

  2. Turn on “Link loop points to time selection” and “Link to arrange view” (wording can vary slightly depending on REAPER version).

  3. Now, whenever you make a time selection in the MIDI editor, the same selection is made in the arrange view.

  4. With repeat enabled (shortcut: R), REAPER will loop that section.

Option 2 – Set the loop directly in arrange view

  1. Close the MIDI editor (or just leave it open).

  2. Drag in the arrange view’s ruler to create a time selection over your MIDI item.

  3. Turn on repeat (R).

  4. Playback will loop exactly over that range.

Why it wasn’t working:
Your MIDI editor’s time selection was purely visual — REAPER’s transport controls don’t know about it unless it’s linked to the arrange view’s time selection.

i found sync editor transport to project transport and it worked but i have a question is there any problem after syncing it

No real “problem” — it just changes how the MIDI editor behaves so it’s always tied to the main project’s transport and looping.

Here’s what syncing Editor transport to Project transport actually does:

Effects after enabling it:

  1. One playhead, not two

    • The MIDI editor’s playback position will always match the arrange view’s playhead.

    • No more separate green “edit cursor” starting in a different place for playback.

  2. Loops follow the project

    • If you loop a section in the arrange view, the MIDI editor will loop exactly that section.

    • MIDI editor’s local time selection no longer acts independently — it’s just showing the same range as the arrange view.

  3. Start/stop control is unified

    • Pressing Space anywhere starts/stops the whole project, not just the MIDI editor’s local playback.

Downsides / trade-offs:

  • You lose the ability to audition or loop just inside the MIDI editor without affecting the main project’s play position.

  • If you liked working on a MIDI clip in isolation (while the main timeline is somewhere else), that workflow won’t work unless you turn syncing off again.

So basically:

  • If you want simplicity and always want playback & loops to match the main project → keep it ON.

  • If you want independence for focused MIDI editing without moving the main playhead → turn it OFF when needed.


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