Replacing Stems and Re-analyzing a Song

How to swap files on an existing song, avoid duplicates, and get a clean re-analysis.

Replacing a stem

Inside an arrangement, re-upload a file with the same name to replace the previous version (upsert). Re-uploading is safe for that path.

If you upload different names, you get additional stems — that is the usual reason people see “I uploaded 8 and now I have 16.”

Cleaning up before a fresh analysis

If old files are confusing analysis or playback:

  1. Remove the stems you no longer want from the arrangement.
  2. Upload the definitive set (matching names if you intend to replace).
  3. Run the option you still need. Key, Tempo, Time Signature and Sections refills key, tempo, time signature, and sections, and does not show lyrics. Lyrics and Chords refills lyrics and chords together, and does not replace key, tempo, time signature, or sections. Each selected option is its own credit charge.
  4. If sections or tempo look wrong after a partial re-upload, prefer a clean arrangement rather than layering conflicting files. Do not re-run Key, Tempo, Time Signature and Sections to fill an empty Lyrics tab — check Lyrics and Chords. See Lyrics Text vs Timing (and AbleSet).

Duplicate stems after zip upload

Zips that contain both nested folders and top-level copies of the same audio can produce extras. Prefer a flat zip of the stems you actually want, or delete the duplicates after import.