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.

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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                 }         }

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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

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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 }

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Best regards Jörg Krause