Converting 192 MP3 to 128 MP3...Effects on fidelity

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Converting 192 MP3 to 128 MP3...Effects on fidelity

Post by wayneDL » Mon Feb 06, 2006 11:12 pm


I'd like to convert a bunch of music files, mostly MP3 but some AAC, to 128-bitrate MP3 so I can have more music on the 1GB SD card in my Palm.

If I convert higher bitrate MP3's to lower bitrate MP3's, is the conversion extra lossy? What I mean is--should I first convert the higher bitrate MP3's to a lossless format and then convert the lossless format to the lower bitrate MP3's?

I hope I made that clear enough. Basically, I'd like to have smaller MP3 files with as much fidelity as possible, and I'm starting off with 192 bitrate MP3's.



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Post by sbooth » Tue Feb 07, 2006 5:53 am

I would highly recommend against any lossy -> lossy conversion! I'm not sure the tradeoff in space would be worth the loss in fidelity.

The way Max works is that it converts everything to 16-bit 44.1 kHz PCM as an intermediate before it is converted to the output format; so I think that a straight conversion would be your best bet. That way you would avoid two sets of decoding/encoding cycles.

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