[Vorbis] Re: Question about volume level recording in Ogg Vorbis

[Monty]

On Fri, Oct 01, 2004 at 03:55:53PM +0200, Bj?rn Lindstr?m wrote:
> "Franck Charlemagne" <fcharlemagne at workit.fr> writes:
> 
> > Is the reason of this fact is that it's depends on the volume level at
> > burning time of the original CD ? If not, what is the reason ?
> 
> That's correct. There isn't (and shouldn't be) any standards for
> recording volume of CD:s.

you mean 'percieved loudness' not 'recording volume'.  Pretty much all
CDs use the full amplitude range.

If you want to play with the effect of changing how loud music is
without affecting the actual linear amplitude, play with 'multiband
companding' in Postfish (as a start ;-)

> > Is there any way to increase volume level at Vorbis encoding time ? If
> > yes with which tools?

You will clip.  Don't do it.  

If you absolutely must do this all at encode time, reduce the volume
level, don't increase it.  However, all pop music will end up being
reduced *alot* and the only thing that will stay ~ the same is
classical (the pop music is purposely highly dynamically compressed)

The best way to handle gain issues is during playback where you can
just alter the volume on the fly without modifying the music itself.
Some handheld players will do this; Google for ReplayGain.

Monty