This is a bugfix release that is API and ABI compatible with previous 0.3.x releases.

Highlights

- A new Tag param was added that allows arbitrary metadata to be transported out-of-band in the graph.
- Vulkan DMA buf support was merged.
- The echo-canceller was ported to webrtc-audio-processing-1.
- Fix a regression in locating monitor sources by id in pulse-server.
- Mixer io areas updates are now synchronized correctly with the data thread to avoid potential crashes.
- Many more bugfixes and improvements.

This also looks useful if you use Bluetooth with some Jack applications (although most will work fine with the previous behaviour):

Ports are now marked as physical, which makes the bluetooth devices show up as hardware devices in Ardour and other JACK apps