[alsa-devel] Mixer volume/decibel mapping

[Raymond Yau]

2010/5/25 Clemens Ladisch <clemens at ladisch.de>

> Raymond Yau wrote:
>
>
> > BTW , if ymf7xx (DSP) only accept 16 bit digital PCM data and output to
> > 18-20 bit AC97 codec ,
>
> The DSP uses more precise values internally.
>

DSP use more precise values internally only increase the number of step ( dB
per step is much finer resolution , the dB range is limited to the number of
bits of the input digital signral and output digital signal which pass
through ac97 link

There seem to be no hardware can provide infinte dB range