Skip to main content
Participant
May 31, 2020
Answered

history of effects

  • May 31, 2020
  • 1 reply
  • 1180 views

Can we know history of effects applied to mp3 file after saving and closing it and when we again open it fresh.

This topic has been closed for replies.
Correct answer SteveG_AudioMasters_

No, not at all. For a start, Audition doesn't open MP3 files as such, it decodes them to wav files. What you do to them then is only stored as a sequence of temporary Audition files that you can step back though, and the moment you save the file, that information is deleted - otherwise you'd end up with a drive entirely full of useless temp files in no time.

 

And then, after you've done whatever you are going to, you're going to save it as an MP3 again, so it's going to get re-encoded. No information transfers with that either, as there's no provision within the metadata to store anything like that at all. And there's a reason for that...

 

And that is because MP3 files are distribution files intended for finished work only - not production purposes. Any processing that's happened to it is essentially irrelevant.

 

Also you should note that every time you open, alter and resave an MP3 file in Audition, it loses quality because of the decode-re-encode process - often quite noticeably if it started out as 128k. It's fine to open one and play it, and then close it again without altering it, but that's all.

1 reply

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community ExpertCorrect answer
Community Expert
May 31, 2020

No, not at all. For a start, Audition doesn't open MP3 files as such, it decodes them to wav files. What you do to them then is only stored as a sequence of temporary Audition files that you can step back though, and the moment you save the file, that information is deleted - otherwise you'd end up with a drive entirely full of useless temp files in no time.

 

And then, after you've done whatever you are going to, you're going to save it as an MP3 again, so it's going to get re-encoded. No information transfers with that either, as there's no provision within the metadata to store anything like that at all. And there's a reason for that...

 

And that is because MP3 files are distribution files intended for finished work only - not production purposes. Any processing that's happened to it is essentially irrelevant.

 

Also you should note that every time you open, alter and resave an MP3 file in Audition, it loses quality because of the decode-re-encode process - often quite noticeably if it started out as 128k. It's fine to open one and play it, and then close it again without altering it, but that's all.

monus4444Author
Participant
June 1, 2020

thank you for your answer, apart from opening and editing mutiple times, does noise removal also decreases the quality of sound.

SteveG_AudioMasters_
Community Expert
Community Expert
June 1, 2020

It can do unless you do it very carefully, and in multiple passes at different FFT sizes, and hardly take any off at each pass. In theory NR looks simple; in practice it's one of the hardest things to get right.