From: Joaquim Carvalho <jdc_at_x64.com>
Date: 21 Jan 2003 10:37:56 +0000

On Mon, 2003-01-20 at 23:07, Linus Nielsen Feltzing wrote:
> Björn Stenberg wrote:
> > Joaquim Carvalho wrote:
> >
> >>Full volume on the jukebox should be full volume. Exceeding the
> >>output limit of the DAC (16 bits -> +32767 to -32768 ) for putting
> >>a few more milliwatts into the headphones is not a good thing.
> >
> >
> > You mean every other consumer audio equipment you own is perfectly distortion free at max volume? Your discman, walkman, pocket FM radio?
> >
>
> Ooops. It just came to mind that we do "overdrive" the MAS decoder. The
> 100% volume setting in Rockbox is 12dB, and 90% is 0dB. Setting the
> volume above 90% may introduce digital distortion.
>
> We can solve this in several ways:
>
> 1) Don't allow a volume above 0dB
>
> 2) Give a warning when setting it above 0dB
>
> 3) Let 0dB be 100% and allow the user to set it up to 110% (or whatever)
>
> 4) Don't do anything
>
> 5) ???
>
> /Linus
>

IMHO a setup item to enable/disable setting output volume above maximum
distortion-free level. (disabled by default?)

P.S.
I would recommend people who want to play music at LOUD volumes to buy
some headphones with a good sensitivity but it's bad for your ears
anyway.
Received on 2003-01-21