On 5/10/2011 10:13, Orchid XP v8 wrote:
> I can only imaging it was the latter. This particular CD is modern
> electronic dance music, after all.

Yeah, I usually encounter it on albums that were old on vinyl. :-)

> You can't tell that information has been lost unless you can tell that 
it
> was there in the first place. And if you can tell there's something mis
sing
> just by looking at what's still there, there's redundancy.

Except you can compare to that which you've heard elsewhere. Have you eve
r 
heard someone do a call-in phone interview on the radio? Could you tell t
he 
difference between the DJ's voice and the phoned-in voice, even though yo
u 
might never have heard either before? It's because you know what tonal 
ranges you should be hearing.

You can tell an over-compressed violin because you're comparing it to oth
er, 
uncompressed violins in your memory. Even if there's no redundancy left. 

Indeed, why do you not think you're hearing a lack of redundancy?

> Take any piece of sound. Apply too much MP3 compression. You can hear t
he
> quantinisation steps in the signal levels.

OK.

> This isn't that bad, of course. You have to listen fairly hard to hear 
it.
> Then again, I'm the sort of person who owns a £100 set of headphon
es and a
> £300 CD player, so...

Yep.

-- 
Darren New, San Diego CA, USA (PST)
   "Coding without comments is like
    driving without turn signals."

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