On 2007-08-18, Bob Tennent <BobT@xxxxxxxxxxxxx> wrote:
> On Sat, 18 Aug 2007 17:45:01 GMT, Kelsey Bjarnason wrote:
>
> ><quote>
> > FLAC: This codec, favored by Grateful Dead tape traders, stands for Free
> > Lossless Audio Code. It reduces storage space by 30 percent to 50 percent,
> > but without compression. A full audio CD can be burned from the file,
> > unlike from MP3s.
> ></quote>
> >
> > Reduces storage space by 30-50% *without* compression. Ah, so it simply
> > cuts the songs off halfway through.
>
> Different kind of compression: compressing the dynamic range, as was
> necessary with LPs, for example.
See riaa curve for details.
The record was pressed with the curve in place and the electronics in
the pre-amp compensated and put things back to flat again.
Mostly done for to allow really low and less so high frequencies
to be recorded on vinyl without the cartridge dancing out of the grooves.
http://en.wikipedia.org/wiki/RIAA_equalization
Of course dynamic range on most recordings is compressed to give
that "in your face" sound when the songs are played on the radio.
The effect is that the song sounds very loud and punchy even
though the dynamic range is less than that on the source recording.
A classic example is the guitar on "Eric Carmen and the Rasberries"
"Go All The Way".
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