Jump to content

need some help with music files...


morfix
 Share

Recommended Posts

hi every1...

i'm looking for a program or plugin for winamp or whatever that can check if a wave file is an original one.

what i mean that i have some wave files on my computer and i wanna make sure that they are original and not a mp3 file that was encoded to a wave file...

a friend told me that there is no program that can check this, but i'm sure that there must be such prog.

sorry about my english

and thanks if any1 can help me with this.

Link to comment
Share on other sites


Yes, looking for artifacts is one way, but if the MP3 encoding was done at a high enough quality it's nearly indistinguishable from the original. Same with JPG images at 100% quality.

Do you want me to show you ugly degradation visible to the naked eye in 100% jpgs ?

Here is one. It's some artwork I am doing. It's in true color png (lossless). Convert it to 100% jpg and see what I mean. Huge loss of quality.

http://stashbox.org/uploads/1150207339/Master%20001s.png

As for audio it is the same I believe as lossy is not lossless, but without an original to do an ABX test with, it may be hard to say. So the above artifact identifier is probably the best method without originals.

Hydrogen Audio is the best place for that type of question anyway.

http://www.hydrogenaudio.org/forums/index.php

Link to comment
Share on other sites

LLXX

Yes, looking for artifacts is one way, but if the MP3 encoding was done at a high enough quality it's nearly indistinguishable from the original.

For example

CD-Audio

CDDA.jpg

CDDAFr.jpg

CDDA --> mp3 (320kb/s) --> CDDA

Ripper.jpg

Ripperfr.jpg

No comments :whistle:

Link to comment
Share on other sites

Yes, looking for artifacts is one way, but if the MP3 encoding was done at a high enough quality it's nearly indistinguishable from the original. Same with JPG images at 100% quality.

Do you want me to show you ugly degradation visible to the naked eye in 100% jpgs ?

Here is one. It's some artwork I am doing. It's in true color png (lossless). Convert it to 100% jpg and see what I mean. Huge loss of quality.

http://stashbox.org/uploads/1150207339/Master%20001s.png

As for audio it is the same I believe as lossy is not lossless, but without an original to do an ABX test with, it may be hard to say. So the above artifact identifier is probably the best method without originals.

Hydrogen Audio is the best place for that type of question anyway.

http://www.hydrogenaudio.org/forums/index.php

Perhaps your JPG encoder's "100%" isn't the same as mine... and your test sample looks like it was designed to test the limits of the encoder (nice art btw). Here, for your enjoyment, is a JPG created from your above sample at 100% quality level: http://img107.imageshack.us/img107/6702/master001s2pl.jpg

@Elektrik: I definitely see a difference, but all MP3 encoders are not created equal, just as JPG encoders I demonstrated above.

Link to comment
Share on other sites

It is undeed indistinguishable by eye.

I have looked around a bit and I have finally managed a similar as yours with PhotoImpact 5 and IrfanView which both have an option to disable subsampling unlike the ones I use normally.

Link to comment
Share on other sites

LLXX

I definitely see a difference, but all MP3 encoders are not created equal, just as JPG encoders I demonstrated above.
MP3 is a perceptual audio coding algorithm. Perceptual encoding is a lossy compression technique, i.e. the decoded data is not an exact replica of the original digital audio data.

http://www.iis.fraunhofer.de/amm/projects/mp3/index.html

Observable frequency of a cut 16KHz is a native testimonial of mp3

About *.png & *.jpeg. I compare its with help ACDSee 8 and find some difference. Example, for brightness

Master.jpg

Edited by Elektrik
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.


×
×
  • Create New...