Anonymous - 2009-11-05

I was wondering if there was a lossless algorithm for volume normalization for the MP3 format. I mean, many image format can be rotated without any quality loss as we just need to swap some bytes.

I don't know the MP3 format that much but, isn't multiplying the audio data by a x factor a solution? I think it's pretty sad to first convert the file to wav then apply the algorithm then converting it back to MP3 (where there's a quality loss).

Also, as the quality loss in the MP3 format is determined by the removed "inaudible" audio spectrum, would encoding an MP3 to, let say 128 kbps, then decoding it then re-encoding it, using the same settings and encoder, give different result? After all, the "useless" data is already gone…

Yeah, I know, those are some very technical questions ;)