Currently have : Raspberry Pi 3 running Kodi and an old stereo system. I’d like to use the stereo as a Bluetooth speaker for the Pi. Any Kodi addon that allows audio output to the Aux output device, or do I need to configure PulseAudio manually? Any advice on setup would be appreciated!

If you want a solution now, you might need to:

Install and configure PulseAudio on your Raspberry Pi.

Pair your stereo via Bluetooth using bluetoothctl.

Route Kodi’s audio through PulseAudio to the Bluetooth device.

Let me know if you need detailed steps!