What is the hardest part of turning scanned sheet music into an editable score?

StaveWave launches September 16. It converts sheet music PDFs and photos into editable MusicXML, with uncertain measures shown beside the original scan for review. You can edit notes, check rhythm, and listen before exporting MusicXML, MXL, or MIDI.

We are interested in the work that happens after recognition: which errors take the most time to find and correct, and what would make reviewing a converted score easier?

If you work with scanned scores, tell us what kinds of music you convert and where your current workflow gets stuck. You can try StaveWave at https://stavewave.com/ with 100 free credits. Current conversions are drafts for review.