>
>
> I was reading in one source that you can
> 1) convert MP L3 to MP L2 in the digital
> domain without going analog
They probably mean: unpack the frame, apply the inverse MDCT, and then
re-encode the filterbank output directly as MP2. As opposed to
sending the data through the inverse filterbank, and then back through
the filterbank for MP2 encoding. (I'm assuming MP2 and MP3 use the
same filterbank routines?)
> 2) that MP L2 (l3?) gain & cross-fades can be
> done in digital domain by adjusting sub-band
> parameters.
Does anyone know if the MP2 gains are huffman encoded? In MP3, they
are, so changing there values could increase the data size which
might push you over some limit. In MP2, I dont think they are compressed,
so you might be able to change them directly in the the MP2 file.
> Anyone have more info on how this is done/
> how to actually code this?
>
Just a lot of mucking around with a mp3 decoder and mp3 encoder :-)
Mark
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