Hi,
I configured my softvol plugin with a min_dB value of -6.0. However, if
I store the state with alsactl store, the comment section shows a dbmin
value of 0.
I figured out that the softvol plugin adds the tlv info when it adds
the user ctl and stores the db values in snd_pcm_softvol_t. Why differ
the values of the tlv and the values of snd_pcm_softvol_t?
My goal is to get information of the current dB value used by the
softvol plugin, e.g. -6.0dB for a raw volume value of 255 and -51.0dB
for 0. However, I only get values from +0 to +51dB
using snd_ctl_convert_to_dB(). Do I miss something?
Note, that I started from a clean asound.state.
---
The state produced by alsactl:
control.1 {
iface MIXER
name Master
value.0 255
value.1 255
comment {
access 'read write user'
type INTEGER
count 2
range '0 - 255'
tlv '00000001000000080000000000000014'
dbmin 0
dbmax 5100
dbvalue.0 5100
dbvalue.1 5100
}
}
---
The output of aplay -D softvol -v:
Playing WAVE '/test.wav' : Signed 16 bit Little Endian, Rate 44100
Hz, Stereo
Soft volume PCM
Control: Master
min_dB: -57
max_dB: -6
resolution: 256
---
My asound.conf:
pcm.!default {
type plug
slave.pcm "softvol"
}
pcm.softvol {
type softvol
slave {
pcm "hw:0"
}
control {
name "Master"
card 0
}
min_dB -57.0
max_dB -6.0
}
ctl.!default {
type hw
card 0
}
ctl.softvol {
type hw
card 0
}
---
Best regards
Jörg Krause
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