Spectro for Mac

Spectro is a native macOS application that detects fake lossless audio files in DJ libraries and music collections. It analyzes WAV, FLAC, AAC, ALAC, AIFF, and MP3 files using spectral frequency analysis and returns an automatic verdict for each file: LOSSLESS, FAKE, or MEDIUM.

A fake lossless file is a WAV or FLAC that was transcoded from an MP3 or other lossy source, it takes up lossless file space but sounds no better than the compressed original. Spectro identifies these files by detecting the spectral cutoff patterns that lossy encoders leave behind, and shows the spectrogram so you can verify the result yourself.

Key features: Automatic LOSSLESS / FAKE / MEDIUM verdict per file Batch scanning — drag a folder and scan hundreds of tracks at once Visual spectrogram with the frequency cutoff clearly visible Finder tags mark risky files so they appear in your normal workflow Fully offline — audio never leaves your Mac Import Rekordbox Library — Load your full Rekordbox collection by importing the rekordbox.xml file. Spectro resolves all track paths and queues them for analysis automatically. Import .M3U8 Playlist — Open any .M3U8 playlist file to scan a specific set of tracks without browsing folders manually. Export Scan as CSV — Export your scan results as a CSV file with per-track verdicts, declared bitrate, and confidence score — ready for spreadsheet or further processing. Watch Folder — Monitor a folder in the background. Whenever new audio files are added, Spectro analyzes them automatically and sends a system notification with the results. Native Apple Silicon and Intel support — no Rosetta, no command line

Spectro is the modern macOS alternative to AudioChecker, which no longer runs on current macOS versions. It also extends what Spek does: where Spek shows a spectrogram you have to interpret manually, Spectro adds an automatic verdict and batch processing designed for DJ library maintenance.

Free trial included: analyze your first 100 files at no cost, no account required. Full license is $39 one-time — no subscription.

Runs on macOS 13 Ventura or later (Apple Silicon and Intel).