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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: gladcarrot on July 14, 2010, 07:05:23 PM

Title: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: gladcarrot on July 14, 2010, 07:05:23 PM

I'm sure there's a thread about this somewhere but here goes...

What is the easiest way to determine if a FLAC is mp3 sourced?

I use Audiochecker but I've heard some criticism of it.  I have a lot of shows from around 2000 that have turned out to be mp3 sourced.  I suppose this was before torrenting when people shared mp3s on P2P networks then burned them to CDr and eventually re-ripping as WAVE or FLAC. 

Title: Re: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: vanark on July 14, 2010, 08:27:27 PM

I find that looking at the Frequency analysis and Spectral view is the best way.  Good discussion the topic over at the Trader's Den.

http://www.thetradersden.org/forums/showthread.php?t=4288

A whole forum on lossy or lossless.  Lots of info there.

Title: Re: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: guysonic on July 14, 2010, 08:33:42 PM

Agree looking at a simply spectrum graph is most revealing.   MP3 audio typically has above 12-15K Hz audio totally missing, or if VBR encoded, has the higher frequencies poping up and then disappearing.

Title: Re: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: mmedley. on July 14, 2010, 11:30:20 PM

Even easier is to just use Traders Little Helper to test for MPEG. Pretty damned accurate.

Analysis > Test wav files for mpeg

Title: Re: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: Ziggz on July 15, 2010, 08:00:32 AM

TLH can be inaccurate at times, especially on FM sources and stuff that's had noise reduction done.

Title: Re: What is the easiest way to determine if a FLAC is mp3 sourced?
Post by: Johnny Thunder on July 15, 2010, 08:30:47 AM

Yup, read up on this at The Trader's Den. ALL the information is already there.

-Johnny