Protect the irreplaceable part
Identify the vocal take, hook, groove, underlick or emotional turn that makes the generation worth keeping. Every repair decision should protect that core.
Classify the failure
Separate writing problems, performance problems, arrangement problems and audio defects. A weak second verse needs a different solution from metallic sibilance or low-end masking.
Choose the smallest effective repair
Edit structure before rebuilding the mix. Use regeneration for broken performances, stems for balance conflicts, and audio processing for tonal or dynamic defects that remain stable.
Validate the finished sequence
Check transitions, repeated sections, mono compatibility, vocal continuity and loudness-matched before-and-after playback. Repair should feel invisible when the song plays from beginning to end.
Keep the reason you saved the song audible through every repair.