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List:       kde-multimedia
Subject:    Re: volume scale
From:       Stefan Schimanski <1Stein () gmx ! de>
Date:       2000-08-27 21:08:00
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Am Sun, 27 Aug 2000 schrieb Stefan Westerfeld:
> Hi!
>
> On Sun, Aug 27, 2000 at 10:32:11PM +0200, Stefan Schimanski wrote:
> > I have to convert the volume value in kaiman into the format aRts uses in
> > its volume control. kaiman uses percent values at the moment. Which scale
> > is used by aRts? Anything like dB? The current code in Kaiman seems to be
> > wrong.
>
> Plain multiplication, so it multiplies each sample with scaleFactor. This
> means that 0.0 is silence, 1.0 is unchanged volume. So with one client
> playing an mp3, anything beyond 1.0 will probably give clipping.

Ah, easier than I thought :) Then this should be correct to convert the 
percent value into aRts volume, shouldn't it?

    if ( vol<0 ) vol=0;
    if ( vol>=100 ) vol=100;

    _volumeControl.scaleFactor(vol/100.0);

cu
  Schimmi
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