[BUG] Volume control actually does not change the volume

[Schievel1]

Describe the bug
When I raise or lower the volume in the panel the actual volume of the sound output does not change.

To Reproduce
Steps to reproduce the behavior:

1. Lower or raise volume

Expected behavior
Volume changes

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):
Gentoo
hyprland 0.30.0
nwg-panel version 0.9.14

Additional context
I guess I am just missing a program to change the volume programmatically. But I don't know which. I don't use pulseaudio an my system, only pipewire. So which is nwg-panel using in this case?

[nwg-piotr]

You need either pamixer or pactl package:

def set_volume(percent):
    if nwg_panel.common.commands["pamixer"]:
        subprocess.call("pamixer --set-volume {}".format(percent).split())
    elif nwg_panel.common.commands["pactl"]:
        subprocess.call("pactl set-sink-volume 0 {}%".format(percent).split())
    else:
        eprint("Couldn't set volume, no 'pamixer' or 'pactl' found")

[Schievel1]

I have pactl but when I run this command in the terminal the slider in nwg-panel changed but the volume doesn't.

I guess this has nothing todo with nwg-panel then

[nwg-piotr]

Yes, it must be a problem with your system.

[Schievel1]

It on the terminal works when I use the sink 1 like this:
set-sink-volume 1 100%

So apparently my system has a sink 0 that isn't used.
Couldn't nwg-panel use the command pactl set-sink-volume @DEFAULT_SINK@ {} instead? I am by no means an expert on this, but at first glance this should cover more edge cases.