hmmm, according to the (sparse) docs,
Message Class – 0x1
Message Type – 0x040
Payload – <mimetype><NUL>
Possible mime types are
audio/mpeg
audio/aacp
audio/aac
audio/ogg
<NUL> - ASCII 0x00
If the mime type is valid, the distribution point sends a Stream Mime Type message back to the broadcaster with a message payload of “ACK\0” (Length=4). However if the distribution point rejects the broadcaster information it may respond with a Stream Mime Type message with a message payload of “NAK:<Reason>\0”
I don't think one would get to the point of sending NSV data - mimetype negotiation should fail according to that
oh well - I haven't used NSV for almost 2 years now, so no great loss
