[alsa-devel] alsactl adds volume controls?

[Raymond Yau]

2010/10/8 Clemens Ladisch <clemens at ladisch.de>

> Colin Guthrie wrote:
> > What is odd about this tho', is that the flag for min is mute (0x10000)
> > is checked on tlv[3] which is also used here for the "max" value.
>
> SND_CTL_TLVT_DB_SCALE uses a flag in tlv[3] to indicate min-is-mute, but
> SND_CTL_TLVT_DB_MINMAX has a variant SND_CTL_TLVT_DB_MINMAX_MUTE.
> (The HDA driver uses DB_SCALE).
>
> > +       if (db_gain <= min) {
> >                 *value = rangemin;
> > +               if (xdir > 0 && (tlv[3] & 0x10000) && db_gain >
> SND_CTL_TLV_DB_GAIN_MUTE)
> > +                       *value = rangemin + 1;
>
> This should go at the same place in the SND_CTL_TLVT_DB_SCALE branch.
>
>
> Regards,
> Clemens
>


How about softvol plugin , the dB scale seem wrong, it alwaysl mute at
min_dB even if I change min_dB to -21 ?

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