

If I added a new sync point and playback got wonky, I'd delete that set of markers and dive back into the transient guides, looking for a better match nearby. As long as I left the playhead within the stretch-markered region I was working on, every additional sync point would add additional clarity and phase alignment. I'd zoom in, look for a pair of transient guides that seemed to match up, click them to automatically create stretch markers, and I'd line them up using the Magnetic trick (zoomed all the way in to the level of plotted samples) and try again. Once those were synced up perfectly, I just started scrubbing through the files looking for stuff that seemed out of phase. I used the transient guides to automatically locate the identical transients between the waveforms and used Magnetic Stretch Markers to line them up (snap and grid disabled) at the beginning and the end of the show. I did a little more digging and found this trick, to create Transient Guides automatically. (when I saw those wavs moving around together my jaw dropped) The relevant part comes at around 1:10 here: More specifically, Magnetic Stretch Markers. I believe I've struck upon something pretty major in Reaper for our needs: Stretch Markers.
