Internet music dealers currently sell "CD-Quality" tracks, or even better ("Studio-Master"), thanks to lossless audio coding formats (FLAC, ALAC). However, a lossless format does not guarantee that the audio content is what it seems to be. The audio signal may have been upscaled (increasing the resolution), upsampled (increasing the sampling rate) or even transcoded from a lossy to a lossless format. Lossless Audio Checker analyzes lossless audio tracks and detects upscaling, upsampling and transcoding.

AES papers

Lossless Audio Checker 2.0 was presented on October 30th, 2015 at the 139th Audio Engineering Society (AES) Convention in New York. More information about our paper is available here.

On February 27th, 2019, Olivier Derrien published his AAC Transcoding detection algorithm in the Journal of the Audio Engineering Society (JAES) Volume 67 Issue 3 pp. 116-123. His journal article can be found here.

Detection algorithms

Work in progress


Personal Use Only: Redistribution for commercial use is strictly prohibited.

Platform GUI v2.0.7 (Regular users) CLI v2.0.5 (Power users)
Windows 64-bit 32-bit 64-bit 32-bit
macOS - 64-bit
Linux - - 64-bit 32-bit
Supported formats WAVE, FLAC WAVE
Changelog Changelog Changelog