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No volume control with amp2

Hi all,

I am installing a Raspberry 3B+ with amp2, the os is Raspbian Full

With the line “dtoverlag=hifiberry-dacplus” in /boot/config.txt file

But now I can’t use the volume control, it works alone 0% or 100% nothing in between

 

Aplay -l:

**** List of PLAYBACK Hardware Devices ****

card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 []

  Subdevices: 1/1

  Subdevice #0: subdevice #0

 

Amixer:

Simple mixer control 'Master',0

  Capabilities: pvolume pswitch pswitch-joined

  Playback channels: Front Left - Front Right

  Limits: Playback 0 - 65536

  Mono:

  Front Left: Playback 65536 [100%] [on]

  Front Right: Playback 65536 [100%] [on]

Simple mixer control 'Capture',0

  Capabilities: cvolume cswitch cswitch-joined

  Capture channels: Front Left - Front Right

  Limits: Capture 0 - 65536

  Front Left: Capture 65536 [100%] [on]

  Front Right: Capture 65536 [100%] [on]

 

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