Remastering low quality audio files

Remastering low quality audio files

Discuss sound effects, game music, and the creation thereof.

Moderator: Moderators

Post Reply
User avatar
rattle
Damned Developer
Posts: 8278
Joined: 01 Jun 2006, 13:15

Remastering low quality audio files

Post by rattle » 25 Jun 2012, 15:38

Anyone here a sound engineer or having experience in mastering who could give me some advice on how to remaster low quality audio files (perhaps using audacity and it's billions of filters), as in adding back in the low and high end that was cut off, to a certain point?

So far I've tried an exciter followed up with a compressor in Audacity but my understanding of how these things work is rather...limited.

ps: don't tell me to re-rip as this is not possible due to being a low quality internet mp3 release.
0 x

User avatar
Forboding Angel
Evolution RTS Developer
Posts: 14564
Joined: 17 Nov 2005, 02:43

Re: Remastering low quality audio files

Post by Forboding Angel » 02 Jul 2012, 09:19

It's possible, but not easy.

Basically you have to recreate those frequencies. You can to some extent by running it through stereo and reverb filters.

In the end though, there is only so much you can do with bad input.

First experiment with reverb filters first, then go to equalizers, etc. It's a pretty time consuming process, but not impossible.
0 x

User avatar
jK
Spring Developer
Posts: 2299
Joined: 28 Jun 2007, 07:30

Re: Remastering low quality audio files

Post by jK » 02 Jul 2012, 09:54

aren't there Bicubic & cosine filters?
0 x

User avatar
rattle
Damned Developer
Posts: 8278
Joined: 01 Jun 2006, 13:15

Re: Remastering low quality audio files

Post by rattle » 03 Jul 2012, 22:47

It's a pretty time consuming process, but not impossible.
and a lot of rinse and repeat... gives me a headache

I'd just hire a mastering studio if I was like richie rich
jK wrote:aren't there Bicubic & cosine filters?
most likely.. how do they bring back lost frequecies?
0 x

User avatar
jK
Spring Developer
Posts: 2299
Joined: 28 Jun 2007, 07:30

Re: Remastering low quality audio files

Post by jK » 03 Jul 2012, 23:22

FFT + interpolation

Similar to image upscaling, just much better results as sounds are much better harmonic and so are FFT-able.
0 x

Post Reply

Return to “Sound Effects & Music”