Hello,

I often want to stream music to the phone from the computer, or from the computer to the phone.

Streaming sound from the phone to the computer is somewhat possible using Bluetooth, if the computer happens to be a laptop or a tablet or has a bluetooth adapter, by making the computer advertise itself as a sound device using PulseAudio. The biggest problems here is requiring Bluetooth support on the computer and having to fiddle with settings, and distance between the phone and the computer.

The reverse is also possible, by using Simple Protocol Player (https://kaytat.com/blog/?page_id=301), but this is hard to setup, or by using the PulseAudio server built in XServer XSDL, but I found it does not work reliably and requires leaving the app at the foreground and the screen on. It also requires running apps using the PULSE_SERVER environment on the computer, since XServer XSDL does not advertise its PulseAudio Server using Avahi.

It would be great if KDEConnect could add a PulseAudio sink that would stream audio to the phone.

What do you think about this?

The reverse (playing sound from the phone on the computer) is probably harder / impossible to do (I don't know if Android APIs allow to hijack sound playing on the device), but it would be a nice feature.