Overview

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.

Research papers

Detection algorithms

Upscaling

Upsampling

AAC-SIN Transcoding: AAC tracks, encoded using sine windows, transcoded to a lossless format

Work in progress

AAC-KBD Transcoding: AAC tracks, encoded using KBD windows (e.g., Nero AAC), transcoded to a lossless format

MP3 Transcoding: MP3 tracks transcoded to a lossless format

macOS GUI

Downloads

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