3.2.3 Initialization
The underlying game session MUST be established before the voice client can begin operation. In addition, the following MUST occur:
Voice Client List is set to empty.
Next Host Order ID is set to 0 if host migration is enabled as described in section 1.3.3.1.
Current Voice Target List is set to empty for each voice client if server-controlled targeting is enabled.
Jitter Buffers are initialized if the voice session is using the Mixing Voice Session Subprotocol (section 1.3.4).
Current Message Number is set to 0 for all voice clients if the voice session is using the Mixing Voice Session Subprotocol (section 1.3.4).
Current Sequence Number is set to 0 for all voice clients if the voice session is using the Mixing Voice Session Subprotocol (section 1.3.4).