Goodby Pulseaudio !
Quoting pipewire.org : Pipewire provides a low-latency, graph based processing engine on top of audio and video devices that can be used to support the use cases currently handled by both pulseaudio and JACK. PipeWire was designed with a powerful security model that makes interacting with audio and video devices from containerized applications easy. Alongside Wayland and Flatpak we expect PipeWire to provide a core building block for the future of Linux application development.
To make the switch on your Zenwalk or Slackware system : just uninstall pulseaudio and install the Zenwalk pipewire package (pipewire-0.3.18-x86_64-201226.txz). Pipewire emulates Pulseaudio libraries and daemon : so all your applications will work seamlessly including the pavucontrol mixer.
Furthermore : I ported my Pulseaudio patch for SBC XQ (much better than AptX) to Pipewire : so you will have CD quality Bluetooth audio in Zenwalk or Slackware.
Have fun !