Re-encoding MP3s following edit

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glieb
Posts: 5
Joined: Mon Sep 13, 2010 10:09 pm

Re-encoding MP3s following edit

Post by glieb »

If I edit an MP3 file and then re-save it, do the lossy artifacts accumulate as a result of re-encoding?
DougDbug
Posts: 2074
Joined: Wed Feb 16, 2005 3:33 pm
Location: Silicon Valley

Re: Re-encoding MP3s following edit

Post by DougDbug »

Yes. All "normal" audio editors have to decompress the MP3 before editing. You may not hear any additional quality loss, but it's something to be aware of and you should minimize the number of times you compress to a lossy format.

There are special purpose MP3 editors such as MP3DirectCut that can so some simple editing without decompressing & re-compressing the file.

FYI - AAC was designed to be more immune to accumulated damage from multiple generations of compression, but that doesn't mean you won't get additional loss if you transcode from MP3 to AAC.
Last edited by DougDbug on Tue Apr 14, 2015 11:45 am, edited 1 time in total.
JackA
Posts: 154
Joined: Thu May 24, 2012 5:52 pm

Re: Re-encoding MP3s following edit

Post by JackA »

glieb wrote:If I edit an MP3 file and then re-save it, do the lossy artifacts accumulate as a result of re-encoding?
I do it all the time. Compare both, see what you hear, if anything. Some good to fair remastering will sound ill when encoded at a lower bit rate, even when done at places like Sterling Sound.

Jack
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