126.96.36.199.2 Processing a Format Change PDU
The structure and format of the Format Change PDU are specified in section 188.8.131.52.
The client sends a Format Change PDU to confirm the format change. After receiving acknowledgment, server MUST set Current audio format as NewFormat. From this point, all audio data sent by the client MUST be encoded using the new audio format. The server MUST decode all audio packets that arrive after this PDU according to the new audio format.