Re: [SoX-users] Complex Change of Amplitude

[Ari M. <ar...@ik...>]

Hi

One solution is to split the file with mp3splt or similar into parts of 
different amplitudes, then apply mp3gain for each part and then  join 
all the pieces back to one file.

This avoids audio deteration due of  uncompress and recompress cycles.



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  Sebastian Schumacher kirjoitti
> Subject: [SoX-users] Complex Change of Amplitude
> Date: Fri, 21 Aug 2015 08:03:48 +0000 (GMT)
> From: Sebastian Schumacher <ba...@me...>
> To: sox...@li...
> 
> Hey guys!
>
> I need to change the amplitude (-v volume) of a mp3 file. That is not really 
> a challenge, but I need to change the amplitude in one file at several 
> "points". Is there a solution for that? Can I say, for example, that the 
> change of volume should take place at 0:45, the next at 0:55 and so on?
>
> I tried to trim the file to edit its segments apart, but it does not really 
> work, because the merged output has a strange and unexpected "zero amplitude" 
> of about approx. 0.060 sec. between the "merge points", caused by sox. 
>
> Thank you for your help!
> Sebastian