Voice Over Recording and Editing with REAPER. This video was edited and exported in the same project session as the voice over recording. REAPER will make basic video edits to sync with your audio edits. Cut the audio, and the corresponding video is cut as well. The blue section is the 'as-is' recorded audio and then the yellow section is the processed edit-ready version. The rainbow waveform is called 'spectral peaks' showing the peak frequency of each part of the waveform. The same word will have the same pattern of colors.