[alsa-devel] wrong decibel data?
Raymond Yau
superquad.vortex2 at gmail.com
Fri Apr 9 02:49:40 CEST 2010
2010/4/8 Nicolo' Chieffo <nicolo.chieffo at gmail.com>
> I'm sorry but I found out that I gave you wrong values of "amixer -D
> pulse": I just discovered that when I lower the alsa master volume, in
> some occasions the PCM volume goes to 99%, so now I will put it to
> 100% and check the pulse volume again.
>
> 0 dB = 65536 [100%]
> -3 dB = 57520 [88%]
> -6 dB = 52057 [79%]
> -12 dB = 41034 [63%]
> -24 dB = 26090 [40%]
> -48 dB = 10151 [15%]
You have to ask PA developer since "PCM" is a softvol control with access
'user' and dbmin -51dB
control.24 {
comment.access 'read write user'
comment.type INTEGER
comment.count 2
comment.range '0 - 255'
comment.tlv '0000000100000008ffffec1400000014'
comment.dbmin -5100
comment.dbmax 0
iface MIXER
name 'PCM Playback Volume'
value.0 255
value.1 255
}
HDA-Intel.pcm.front.0 {
@args [ CARD ]
@args.CARD {
type string
}
type softvol
slave.pcm {
type hw
card $CARD
}
control {
name "PCM Playback Volume"
card $CARD
}
}
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