Audacity - how do I fix this

Soldato
Joined
1 Feb 2006
Posts
8,188
I have an mp3 file which was recorded on mp3 player via a line in. Unfortunately the input volume must have been set too high and so my audio sounds all 'overloaded'. How would I go about fixing this using audacity? Is there any way I can reduce the frequency curves while keeping the sound clean? Sorry I know nowt about sound editing.
 
Dont think its possible, if you have a bad quality recording, say 96kbps, you cant make it 320kbps. You could try and normalise it to reduce the amplitute, but this will just make it quieter. When you turn it up, its still going to be crappy quality
 
Sadly you canny fix this type of problem
When the input level is too high you will end up going outside the "range" of your audio sampler and it will clip the top and bottom of the waveform

Example if you had a simple sine wave input and input level was too high
it would turn the upper and lower peaks into a flat almost square wave
 
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Yep - the peaks of the waveform have been clipped. The information's gone - there's no way to fix it apart from recording it again.
 
Thanks guys. I take it it is always better to have a weak sound recording where you can then increase the gain to make it louder if you wish?
 
Thanks guys. I take it it is always better to have a weak sound recording where you can then increase the gain to make it louder if you wish?

No , its best to play some of the track , monitor the peak meter and then
adjust the levels until its right , try to fast forward to the loudest part of the track

If you have too low a signal you will loose definition
 
Unfortunately i was recording from another audio device into a recorder in real time so couldn't really monitor the audio inputs at the time. Thanks for the info.
 
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