Check commit 451d1d676237c81 for further details.
+## v33, implemented by >= 13.0
+
+Added two values to the pa_encoding_t enum:
+
+ PA_ENCODING_TRUEHD_IEC61937 := 7
+ PA_ENCODING_DTSHD_IEC61937 := 8
+
+## v34, implemented by >= 14.0
+
+New fields in the port introspection data (duplicated for all port types:
+sink, source and card ports):
+
+ string availability_group
+ uint32 type
+
+## v35, implemented by >= 15.0
+
+Added new command for communication with objects.
+
+PA_COMMAND_SEND_OBJECT_MESSAGE:
+sends a message to an object identified by an object path
+
+parameters:
+ string object_path - unique path identifying the object
+ string message - message name
+ string message_parameters - additional parameters if required (may be
+ NULL, which should be treated the same as an
+ empty string)
+
+The command returns a string, which may be empty or NULL (NULL should be
+treated the same as an empty string).
+
#### If you just changed the protocol, read this
## module-tunnel depends on the sink/source/sink-input/source-input protocol
## internals, so if you changed these, you might have broken module-tunnel.