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Topic: fooCDtect detects FLAC as MPEG (Read 3695 times) previous topic - next topic
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fooCDtect detects FLAC as MPEG

There is a Bollywood OST [Jaane Tu...Ya Jaane Na (2008)] composed and recorded digitally by A R Rahaman at his most developed studio in Asia which houses equipment like the Euphonix System 5 Audio Mixing system. The studio has been designed by Studio 440 and the state of the art equipments are from Daxco Digital. This album is claimed to be ripped (by a so called reliable underground ripper community) into FLAC, which I've downloaded from a torrent site recently. After download, I've verified the album for authenticity (being lossless) using foobar2000's fooCDtect utility as a usual practice. What I found is, 3 out of 8 files are concluded to be CDDA with probability 100~99% and rest 5 files are concluded to be MPEG with probability 95% !!! Is it possible that an original rip from a ACD can return such mixed and confusing result? Here's the verbose log of fooCDtect for ready reference.

Quote
fooCDtect - foobar2000 + auCDtect, baralgin.

auCDtect: CD records authenticity detector, version 0.8.2
Copyright © 2004 Oleg Berngardt. All rights reserved.
Copyright © 2004 Alexander Djourik. All rights reserved.

    mode: 0

=======================================================
    Track: 01 Kabhi Kabhi Aditi

Processing file:   [01 Kabhi Kabhi Aditi.aucdtect]
Detected average hi-boundary frequency: 2.105248e+004 Hz
Detected average lo-boundary frequency: 1.811629e+004 Hz
Detected average hi-cut frequency: 2.146257e+004 Hz
Detected average lo-cut frequency: 1.818582e+004 Hz
Maximum probablis boundary frequency: 2.138500e+004 Hz
Coefficient of nonlinearity of a phase: 9.372417e-003
First order smothness: 6.492347e-001
Second order smothness: 5.756803e-001

------------------------------------------------------------
This track looks like MPEG with probability 95%

=======================================================
    Track: 02 Pappu Can't Dance!

Processing file:   [02 Pappu Can't Dance!.aucdtect]
Detected average hi-boundary frequency: 2.104581e+004 Hz
Detected average lo-boundary frequency: 1.831796e+004 Hz
Detected average hi-cut frequency: 2.138296e+004 Hz
Detected average lo-cut frequency: 1.849692e+004 Hz
Maximum probablis boundary frequency: 2.145000e+004 Hz
Coefficient of nonlinearity of a phase: 4.794753e-002
First order smothness: 7.335907e-001
Second order smothness: 4.752545e-001

------------------------------------------------------------
This track looks like MPEG with probability 95%

=======================================================
    Track: 03 Jaane Tu Mera Kya Hai

Processing file:   [03 Jaane Tu Mera Kya Hai.aucdtect]
Detected average hi-boundary frequency: 2.076032e+004 Hz
Detected average lo-boundary frequency: 1.764203e+004 Hz
Detected average hi-cut frequency: 2.115486e+004 Hz
Detected average lo-cut frequency: 1.638104e+004 Hz
Maximum probablis boundary frequency: 2.133100e+004 Hz
Coefficient of nonlinearity of a phase: 1.786193e-002
First order smothness: 6.058798e-001
Second order smothness: 5.739242e-001

------------------------------------------------------------
This track looks like MPEG with probability 95%

=======================================================
    Track: 04 Nazrein Milaana, Nazrein Churaana

Processing file:   [04 Nazrein Milaana, Nazrein Churaana.aucdtect]
Detected average hi-boundary frequency: 2.110577e+004 Hz
Detected average lo-boundary frequency: 1.860959e+004 Hz
Detected average hi-cut frequency: 2.143567e+004 Hz
Detected average lo-cut frequency: 1.923302e+004 Hz
Maximum probablis boundary frequency: 2.142800e+004 Hz
Coefficient of nonlinearity of a phase: 5.887390e-002
First order smothness: 6.786846e-001
Second order smothness: 5.590333e-001

------------------------------------------------------------
This track looks like CDDA with probability 100%

=======================================================
    Track: 05 Tu Bole...Main Boloon

Processing file:   [05 Tu Bole...Main Boloon.aucdtect]
Detected average hi-boundary frequency: 2.073696e+004 Hz
Detected average lo-boundary frequency: 1.685775e+004 Hz
Detected average hi-cut frequency: 2.123818e+004 Hz
Detected average lo-cut frequency: 1.565138e+004 Hz
Maximum probablis boundary frequency: 2.138000e+004 Hz
Coefficient of nonlinearity of a phase: 3.951717e-002
First order smothness: 5.659864e-001
Second order smothness: 5.955782e-001

------------------------------------------------------------
This track looks like MPEG with probability 95%

=======================================================
    Track: 06 Kahin To...

Processing file:   [06 Kahin To....aucdtect]
Detected average hi-boundary frequency: 2.085330e+004 Hz
Detected average lo-boundary frequency: 1.719929e+004 Hz
Detected average hi-cut frequency: 2.135689e+004 Hz
Detected average lo-cut frequency: 1.660203e+004 Hz
Maximum probablis boundary frequency: 2.133100e+004 Hz
Coefficient of nonlinearity of a phase: 8.232752e-002
First order smothness: 5.852761e-001
Second order smothness: 6.159509e-001

------------------------------------------------------------
This track looks like CDDA with probability 100%

=======================================================
    Track: 07 Jaane Tu Meri Kya Hai

Processing file:   [07 Jaane Tu Meri Kya Hai.aucdtect]
Detected average hi-boundary frequency: 2.069013e+004 Hz
Detected average lo-boundary frequency: 1.735808e+004 Hz
Detected average hi-cut frequency: 2.136341e+004 Hz
Detected average lo-cut frequency: 1.515501e+004 Hz
Maximum probablis boundary frequency: 2.138500e+004 Hz
Coefficient of nonlinearity of a phase: 3.540355e-002
First order smothness: 5.312330e-001
Second order smothness: 5.841934e-001

------------------------------------------------------------
This track looks like MPEG with probability 95%

=======================================================
    Track: 08 Pappu Can't Dance! (Remix)

Processing file:   [08 Pappu Can't Dance! (Remix).aucdtect]
Detected average hi-boundary frequency: 2.091374e+004 Hz
Detected average lo-boundary frequency: 1.824878e+004 Hz
Detected average hi-cut frequency: 2.130007e+004 Hz
Detected average lo-cut frequency: 1.679677e+004 Hz
Maximum probablis boundary frequency: 2.136400e+004 Hz
Coefficient of nonlinearity of a phase: 7.618319e-002
First order smothness: 6.505695e-001
Second order smothness: 4.810934e-001

------------------------------------------------------------
This track looks like CDDA with probability 99%

=======================================================


I would be much happy to learn if any one of the knowledgeable members of this forum may throw some light on such behaviour.

Thank you ...