Hi all,
I like listening to music, and have spent a lot on music CDs.
To my understanding, AAC is better than MP3 in sound quality,
and I have learnt that Tau Analyzer can help distinguish
between the original studio quality and the cheap remakes (CD burnt from MP3, say for example).
Recently, I downloadeded Tau Analyzer and tried to find out if there are fake CDs in my music CD collection.
I randomly picked up a music CD and grabbed a audio track and converted it into WAVE format and AAC format respectively.
Later, I converted the AAC file into WAV format and compared it with the other WAVE file in Tau Analyzer.
What really has surprised me was that I couldn't see any difference in their Spectra,
because the AAC audio didn't show any loss of data in the Spectrum window.
I am wondering if there are other tools that can help me find out any
fake CDs that were burnt from AAC in my music CD collection?
Thanks!
Kitty.
Full Version: Tools to distinguish between AAC and WAV
Try using your ears in a blind test. Other tests are no good!
For example, you can encode a 64kbps mp3 and disable the lowpass filter in the encoder. That way it will look the same as the original CD spectrum because all frequencies are there, but it will sound like utter sh*t.
Looking at spectrum only shows if there was a lowpass filter used by the encoder, but there are much more aspects to sound that you can't show in a graphs, but only can HEAR.
For example, you can encode a 64kbps mp3 and disable the lowpass filter in the encoder. That way it will look the same as the original CD spectrum because all frequencies are there, but it will sound like utter sh*t.
Looking at spectrum only shows if there was a lowpass filter used by the encoder, but there are much more aspects to sound that you can't show in a graphs, but only can HEAR.
QUOTE (Mark7 @ Mar 20 2009, 11:02) 
Try using your ears in a blind test. Other tests are no good!
For example, you can encode a 64kbps mp3 and disable the lowpass filter in the encoder. That way it will look the same as the original CD spectrum because all frequencies are there, but it will sound like utter sh*t.
Looking at spectrum only shows if there was a lowpass filter used by the encoder, but there are much more aspects to sound that you can't show in a graphs, but only can HEAR.
For example, you can encode a 64kbps mp3 and disable the lowpass filter in the encoder. That way it will look the same as the original CD spectrum because all frequencies are there, but it will sound like utter sh*t.
Looking at spectrum only shows if there was a lowpass filter used by the encoder, but there are much more aspects to sound that you can't show in a graphs, but only can HEAR.
Thank you for your help, Mark7.
I only have goldwave for audio conversion, been using it for a long time,
but I am not sure it has any lowpass filter option.
Could you recommend me other software that have built-in lowpass filter option, Mark7?
QUOTE (kwfine @ Mar 20 2009, 23:43)
Hi all,
I like listening to music, and have spent a lot on music CDs.
To my understanding, AAC is better than MP3 in sound quality,
and I have learnt that Tau Analyzer can help distinguish
between the original studio quality and the cheap remakes (CD burnt from MP3, say for example).
Recently, I downloadeded Tau Analyzer and tried to find out if there are fake CDs in my music CD collection.
I randomly picked up a music CD and grabbed a audio track and converted it into WAVE format and AAC format respectively.
Later, I converted the AAC file into WAV format and compared it with the other WAVE file in Tau Analyzer.
What really has surprised me was that I couldn't see any difference in their Spectra,
because the AAC audio didn't show any loss of data in the Spectrum window.
I am wondering if there are other tools that can help me find out any
fake CDs that were burnt from AAC in my music CD collection?
Thanks!
Kitty.
I like listening to music, and have spent a lot on music CDs.
To my understanding, AAC is better than MP3 in sound quality,
and I have learnt that Tau Analyzer can help distinguish
between the original studio quality and the cheap remakes (CD burnt from MP3, say for example).
Recently, I downloadeded Tau Analyzer and tried to find out if there are fake CDs in my music CD collection.
I randomly picked up a music CD and grabbed a audio track and converted it into WAVE format and AAC format respectively.
Later, I converted the AAC file into WAV format and compared it with the other WAVE file in Tau Analyzer.
What really has surprised me was that I couldn't see any difference in their Spectra,
because the AAC audio didn't show any loss of data in the Spectrum window.
I am wondering if there are other tools that can help me find out any
fake CDs that were burnt from AAC in my music CD collection?
Thanks!
Kitty.
Hi there...
You can also use the foobar 2000 abx test to distinguish between aac and wav files.....
You can download it here:
fb2k
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.