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Converting APE to FLAC, Easy, but curious about the technique employed
Recusant
post Apr 11 2010, 13:13
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Forgive what is probably the ultimate noob question, but when Foobar converts APE to FLAC (or maybe anything else?) does it take it back to WAV before doing it?

I'm also curious to know if there's any technical 'loss of quality' (rather than audible, which i assume there wouldn't be) when it is converted to FLAC. I presume it would be no different to the WAV being converted to both a FLAC and APE separately - ie. there's a difference because they're different codecs - not because it's been decompressed and then recompressed.

It's a very simple question, and it's probably been answered elsewhere with different wording, but i couldn't find it.

Cheers.

btw - i've only just set up Foobar and after being initially daunted - i think it's an amazing program: This conversion facility just blows me away. Brilliant! smile.gif
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db1989
post Apr 11 2010, 13:41
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QUOTE
when Foobar converts APE to FLAC (or maybe anything else?) does it take it back to WAV before doing it?

Any application that appears to convert directly between two formats must actually perform an intermediate decompression (in RAM) to PCM. (WAV files are simply PCM streams with a header, stored on disk rather than in RAM.)

QUOTE
I'm also curious to know if there's any technical 'loss of quality' (rather than audible, which i assume there wouldn't be) when it is converted to FLAC.

None whatsoever. Lossless formats are so named for a reason. Please do some basic research on lossless data compression.

QUOTE
I presume it would be no different to the WAV being converted to both a FLAC and APE separately

Decoding two lossless files that were compressed from the same original audio file will give identical results, yes.

QUOTE
ie. there's a difference because they're different codecs - not because it's been decompressed and then recompressed.

Again, there would be no difference. Lossless means without loss, i.e. identical.

QUOTE
It's a very simple question, and it's probably been answered elsewhere with different wording, but i couldn't find it.

Yes, countless times. I don't understand how so many people can fail to understand the simple concept of lossless compression. The clue's in the name.

This post has been edited by dv1989: Apr 11 2010, 14:26
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Recusant
post Apr 12 2010, 11:10
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Thanks for the info.
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