On Mon, 10 Jul 2006 13:05:17 GMT, "dadiOH"
wrote:

Don Pearce wrote:
On Mon, 10 Jul 2006 11:10:55 GMT, "dadiOH"
wrote:

David Morgan (MAMS) wrote:

I had a look, and I can't see how the device works without modifying
dynamic range

Simply put...

1. Find max volume among all songs
2. "Turn up the volume" in all others so their max is the same as the
loudest.

Won't work - can't work. If you have a mixture of music, then peak
levels as related to average loudness will vary wildly. The loudest
sounding will have highly compressed dynamics, with most of the tune
crammed against the limit. If you try to increase the levels of all
the others until they sound as loud, they will all be clipped to hell.

No, not necessarily *sound* as loud just increase the values in the softer
songs until the greatest is equal to the greatest in the loudest song. For
example...

Loud song greatest value = 29000

Song to be changed, greatest value = 24,500

(29000)-(24500) = 4500. Therefore, all values in this song are to be
increased by 4500 when played.

But what does that do? They are just numbers, and they have only the
most tangential relationship to the perceived playing of the track -
which is what this is all about.

Incidentally the maths is all off too. You can't do this by adding
numbers, you have to multiply.

d

--
Pearce Consulting
http://www.pearce.uk.com