Reaper: Advanced crossfade editing and phase alignment

Reaper Try it →Watch full video →Reapertips | Alejandro · Mar 2026

Demo summary

A demo of the new REAPER 7 crossfade editor, showing how to adjust fade shapes, move crossfades with modifiers, and use the phase align button to match waveforms.

Step-by-step

Drag one audio item over another to create a crossfade
Hold Shift and click-drag the crossfade to move its position
Hold Alt and click-drag to adjust the shape of the individual fades
Double-click the crossfade to open the Crossfade Editor
Use the gain and position controls within the editor to manually align waveforms
Click the Phase Align button and select 'Right item position' to automatically match the phase of the right item to the left

Options

Adjust fade edges manually in the timeline
Match gain within the Crossfade Editor
Preview the crossfade directly from the editor window

Watch out for

Low phase alignment percentages (e.g., -5%) indicate poor alignment

Tips

Use the green and red waveform overlays in the editor for a better visual of how the two items overlap
Aim for a higher percentage in the phase alignment readout for better sound quality

Highlights

“this thing is amazing and it will also tell you how aligned the phase is”

All demos from “What HAPPENED to REAPER in a Year?!”

7:411:46Advanced crossfade editing and phase alignmentCurrentA demo of the new REAPER 7 crossfade editor, showing how to adjust fade shapes, move crossfades with modifiers, and use the phase align button to match waveforms.Reaper· AI Audio Editor
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