Spectro

Spectro is a macOS fake NDT tool for DJs and music collections.

Quickly identifying MP3 or AAC files disguised as lossless formats in WAV, AIFF, and FLAC, helping users confirm the quality of audio sources before going on stage. It can batch scan entire folders, process up to 100 files at once, and provide results for each track based on spectral analysis, so you can clearly see which files are truly lossless and which just look lossless. The software writes the results directly to the macOS Finder tab, and bad files can be marked in red for continuous library management at the system level. Spectro runs completely offline, requires no accounts, and does not upload files, making it suitable for local audio quality inspection processes that prioritize privacy and efficiency.