Normalizzare mp3

Prima si cerca il valore di guadagno col comando:

mp3gain -s r <file.mp3>

 

poi si normalizza (3 e` il valore ricavato precedentemente):

mp3gain -g 3 <file.mp3>

ed infine si puo` anche ricontrollare rieseguendo il primo comando.

 

Oppure, con un unico comando:

mp3gain -r -k <file.mp3>

 

Esempio:

$ mp3gain -s r Cirillo-Cocorico\`_Inverno_\'93.mp3

Cirillo-Cocorico`_Inverno_'93.mp3
Recommended "Track" dB change: 4.710000          
Recommended "Track" mp3 gain change: 3
WARNING: some clipping may occur with this gain change!
Max PCM sample at current gain: 20315.630395
Max mp3 global gain field: 178
Min mp3 global gain field: 138

Recommended "Album" dB change for all files: 4.710000
Recommended "Album" mp3 gain change for all files: 3
WARNING: with this global gain change, some clipping may occur in file Cirillo-Cocorico`_Inverno_'93.mp3

$ mp3gain -g 3 Cirillo-Cocorico\`_Inverno_\'93.mp3

Applying gain change of 3 to Cirillo-Cocorico`_Inverno_'93.mp3...
                                                   
done

$ mp3gain -s r Cirillo-Cocorico\`_Inverno_\'93.mp3

Cirillo-Cocorico`_Inverno_'93.mp3
Recommended "Track" dB change: 0.200000          
Recommended "Track" mp3 gain change: 0
WARNING: some clipping may occur with this gain change!
Max PCM sample at current gain: 34166.681546
Max mp3 global gain field: 181
Min mp3 global gain field: 141

Recommended "Album" dB change for all files: 0.200000
Recommended "Album" mp3 gain change for all files: 0
WARNING: with this global gain change, some clipping may occur in file Cirillo-Cocorico`_Inverno_'93.mp3