Re: Mixer volume/decibel mapping

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2010/6/7 Sebastian H. <vand2@xxxxxx>

> Am 07.06.2010 05:37, schrieb Raymond Yau:
> At the moment the sliders are simply sliding linearly from vol. min.
> to vol. max. and there is a label which shows the current dB value.
>
> (This made me realize that the neutral (0dB) position of some HDA-Intel
> record sliders is somwhere in the middle and not at the ends.)
>

For capture volume control , there is gain instead of atten

HDA sepcification define the 0dB offset, so the volume range must contain
0dB somewhere


but some driver may not has 0dB within the volume range any more

http://thread.gmane.org/gmane.linux.alsa.devel/73114/focus=73125
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