[wdmaudiodev] Re: Positive/negative dB range in volume control

  • From: Clemens Ladisch <clemens@xxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Fri, 08 Jul 2011 16:57:13 +0200

Eugene Muzychenko wrote:
> Found a strange behavior of Windows volume level regulators. If a
> driver returns a volume level range that crosses the zero
> (-n..+n dB), Windows volume control applets (XP and Win7) make a
> very uneven scale for the sliders. [...]
> Why volume control application do such strange scaling?

Because dB levels are not proportional with the perceived loudness.

http://msdn.microsoft.com/en-us/library/dd370798%28v=vs.85%29.aspx


Regards,
Clemens
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