Lossless, hires or fake

Is your download genuine?
Although the file format says WAV the source can be a transcoded MP3.
Although the file format says 24 bit, 192 kHz, the source can be upsampled Redbook.


There are a couple of tools available to detect the difference between real and fake.
As much as we struggle, likewise these tools.


A free console program for determining the authenticity of musical CDs.

It claims "by evaluating the character of audio data a CD contains, it can distinguish between original studio-based recordings and those that have been "reconstructed" using a lossy audio source"

Lots of people struggle to detect any difference between CD quality and high bit rate MP3.
Programs like these are like us, at high bit rates they guess wrong.

There are no reliable techniques to discern high bit rate MP3 from lossless (except buying the original of course).

Lossless Audio Checker

According to the website:

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 (only for AAC in this early version).

The AES paper I do think has an interesting approach on how to detect lossy.
The idea is as each codex has its specific characteristics, one must be able to detect this in the audio. At the present they implemented AAC only.


I tried 5 tracks from various CDs. All are flagged as upsampled.

Interesting approach but very much WIP I’m afraid.


Audio Science Review