The whole flow, in one app

Yes. Surco is free and complete, forever: no account, no subscription, no limits. If it saves you hours, you can support its development with a donation.

Yes, and more. Surco edits your music's tags and metadata (artist, title, album, year, artwork…) and fills them in from Discogs, Bandcamp or Deezer. But it also converts between lossless formats, checks audio quality and organizes your library: what you'd do with a tag editor and three other apps, in one.

It depends on whether the format changes. Convert to a different format and the original is left alone, with the copy going to a separate folder (Music/Surco). Re-export to the same format and Surco rewrites that file where it is — which is what lets it update the tags without re-encoding the audio. With "Overwrite original" on, it always rewrites.

It depends on the target format. They survive when you convert between MP3 and AIFF, and when any of the three — MP3, AIFF or FLAC — goes into FLAC: Surco reads the tree Traktor stores inside the file and writes it back in whichever form that format needs. They're lost converting to WAV or ALAC, which have nowhere to keep it, and going from FLAC to MP3 or AIFF. If you trim silence the cues move with it, the beatgrid included — it's re-anchored by phase so the ruler doesn't drift — and anything that can't be re-anchored reliably is dropped rather than left pointing at the wrong beat. Surco warns you before you convert.

Yes. Surco detects the silence at the head and the tail and shows you both cuts on the waveform, with zoom and millisecond nudges, so you can hear how it lands before applying anything. Trim one track or a whole selection at once. Note that trimming re-encodes the audio, so check the cue point answer above.

Surco detects them and interpolates them away as it converts, with four strengths. It marks every click it finds on the waveform so you can jump from one to the next, and it renders the repaired track so you can A/B it against the original while it plays, with no gap in the audio — so you hear whether the repair took the clicks out, and whether it took some of the music with them. It ships off.

Yes. Pick Engine DJ as the destination and every converted track is registered straight into your Engine DJ library — with its cover, rating and a configurable playlist — ready to sync to your players. It also exports collections to rekordbox, Traktor and Serato.

Yes. That's the SmartScreen notice for new apps not yet signed on Windows: click "More info", then "Run anyway". On macOS, Surco is notarized by Apple and opens with no warnings.

It converts between lossless AIFF, WAV, FLAC and ALAC and MP3, any to any. The quality is yours to pick: MP3 bitrate (320 down to 128 kbps, or VBR V0/V2), bit depth and sample rate — by default the source's are kept. It also reads M4A, AAC, OGG and OPUS.

Old downloads sometimes carry malformed WAV headers that other apps choke on. Surco repairs them on a temporary copy as it reads — your original is never touched — so the track plays, analyzes and converts normally.

You lose nothing. Surco saves your unapplied edits on its own as you work, and on reopening it offers to restore the session with everything just as you left it — metadata, covers and matches included, even after the machine froze.

Spanish, English, German, French and Portuguese (Brazil). It follows your system language by default, and you can pin one in Settings.

macOS (Apple Silicon and Intel), Windows and Linux (AppImage). It updates itself, so you'll always have the latest version.