On Tue, 13 Nov 2018 15:23:53 +0100, Guillermo Rodriguez Garcia wrote: > > Hi all, > > I have a board with a tlv320aic3106 codec and a digital mic. The > tlv320aic3106 does not support hardware gain for the digital mic, so I > am using the softvol plugin to provide this via software. > > I would like to setup softvol so that it applies a gain in a range > that goes from approx +10dB to approx +40dB. The problem is that > softvol only accepts negative values for min_dB, i.e. assumes that you > *always* want to do attenuation, and that you might or might not want > to have gain (max_dB can be zero or negative). > > Is there any reason for this, or is it just historical ? (I am aware > that the original softvol plugin only supported attenuation, and that > support for gain was added later) It's mostly a historical reason. > Is it possible to setup softvol to accept a positive min_dB value ? Sure. You'd need to fix some more codes, not only removing the negative min_dB check, though. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
