Pi Musicbox volume control (for Amp hat) not working with Spotify Connect

[ClementAbadie]

Sum up :

• Save/copy the current etc/asound.sh somewhere

• Use “aplay -l” to get a list of the devices on your system. The hw:X,Y comes from this mapping of your hardware – in this case, X is the card number, while Y is the device number.(linux - What do ALSA devices like "hw:0,0" mean? How do I figure out which to use? - Super User)

• Edit /opt/musicbox/startup.sh to comment out line 39 :

#. /opt/musicbox/setsound.sh

• Edit etc/asound.sh to remplace by ( change X and Y by your values ) :

pcm.!default {
    type plug
    slave.pcm  "softvol"
}
ctl.!default {
    type hw
    card X

}

pcm.softvol {
    type            softvol
    slave {
        pcm         "hw: X, Y"  
    }
    control {
        name        "PCM"
        card         X
    }
}

• Use the following command to set the global volume (xx = desired volume). You can add it to a script that run at the startup.

amixer set PCM xx%