Music Zamlr

Music Zamlr compares two local music collections. It shows which tracks you do not have, which tracks exist in better quality in the other collection, and which tracks you already have. Then it copies only the files that you select.

A typical case: you keep your music in two places, for example on a laptop and on an archive drive. Over the years, the two copies became different. Music Zamlr finds the missing tracks and the better copies, such as FLAC files where the laptop has MP3 files.

Three rules find two copies of one track. Identical files match by size and hash. Files with the same sound match by an acoustic fingerprint from Chromaprint, even when the tags are wrong or blank. Other tracks match by artist, title, and duration. An uncertain match goes to you: the tool never makes an uncertain decision for you.

Before an import, a preview lists every file operation. You select what happens to a file that an upgrade replaces: keep both files, move the old file aside, or delete it. The tool deletes a file only after it writes the better copy, and it writes a log of each import.

The program runs only on your computer. It sends nothing over the network and needs no account. It reads MP3, FLAC, WAV, AIFF, AAC, ALAC, Opus, Vorbis, WavPack, Monkey's Audio, DSD, and more formats. You can change the order of the formats that decides which copy is better.