How do I open Mixroadie in REAPER?

Mixroadie is a panel inside REAPER, not an app you open on its own and not a plugin on a track.

1. Open REAPER with the song you want to work on.
2. Save the project. Mixroadie reads the saved project file.
3. Press Cmd+Ctrl+M on a Mac, or Ctrl+Shift+R on Windows.

The panel opens. Dock it wherever you like, and REAPER remembers where.

Open it from the Action List instead

1. In REAPER, choose Actions ▸ Show action list.
2. Type mixroadie in the filter box.
3. Select the Mixroadie panel and press Run.

To open it with one click, drag that action onto a REAPER toolbar. To give it a different key, select it and press Add….

Closing and reopening it

Closing the panel doesn’t stop Mixroadie: pressing the shortcut again brings the same panel back. If an older REAPER asks what to do about the Mixroadie script that is already running, choose New instance and tick “Remember my answer”. Never choose “Terminate instances” while Mixroadie is applying changes.

Nothing happens when you press the shortcut? See The shortcut doesn’t open the panel.