Audio Loop Seam Finder

A loop-seam searcher for musical material. The file is decoded to PCM, and every candidate (start, length) pair in your target range is scored with a normalized cross-correlation of the samples leading into the loop start versus the samples leading into the wrap point — the classic autocorrelation-at-lag approach recommended for loop finding, with an RMS-ratio term so level mismatches are penalized. The best seams are re-refined at the full sample rate, snapped to zero crossings, and exported as a trimmed loop whose tail is crossfaded into its head (equal-power or linear curve), so playback wraps without a click or level dip. A ranked candidate table reports the correlation of each alternative seam. For sample-accurate looping export WAV or FLAC — lossy formats add encoder delay that shifts the wrap point.