Messages that can be gathered with BMediaRoster::StartWatching()for each registered handler, the first message always informs about all exiting nodes, like this:B_MEDIA_NODE_CREATED:BMessage: what = TRIA (0x54524941, or 1414678849)entry media_node_id, type='LONG', c=7, size= 4, data[0]: 0x1 (1, '')data[1]: 0x2 (2, '')data[2]: 0x3 (3, '')data[3]: 0x4 (4, '')data[4]: 0x5 (5, '')data[5]: 0x7 (7, '')data[6]: 0x8 (8, '')Creating, connection, disconnecting and deleting looks like this:B_MEDIA_NODE_CREATED:BMessage: what = TRIA (0x54524941, or 1414678849)entry media_node_id, type='LONG', c=1, size= 4, data[0]: 0x12 (18, '')B_MEDIA_CONNECTION_MADE:BMessage: what = TRIC (0x54524943, or 1414678851)entry output, type='RAWT', c=1, size=328,entry input, type='RAWT', c=1, size=328,entry format, type='RAWT', c=1, size=192,entry be:old_what, type='LONG', c=1, size= 4, data[0]: 0x54524943 (1414678851, 'TRIC')B_MEDIA_CONNECTION_BROKEN:BMessage: what = TRID (0x54524944, or 1414678852)entry source, type='RAWT', c=1, size=16,entry destination, type='RAWT', c=1, size=16,entry be:old_what, type='LONG', c=1, size= 4, data[0]: 0x54524944 (1414678852, 'TRID')B_MEDIA_NODE_DELETED:BMessage: what = TRIB (0x54524942, or 1414678850)entry media_node_id, type='LONG', c=1, size= 4, data[0]: 0x12 (18, '')The following notification is only received if you use the node specific StartWatching,and only if the node you are watching uses BroadcastParameterChange()B_MEDIA_NEW_PARAMETER_VALUE:BMessage: what = TRIL (0x5452494c, or 1414678860)entry be:node, type='RAWT', c=2, size=24,entry be:parameter, type='LONG', c=1, size= 4, data[0]: 0x2 (2, '')entry be:when, type='LLNG', c=1, size= 8, data[0]: 0x2388ad126 (9538556198, '')entry be:value, type='RAWT', c=1, size= 4,entry be:old_what, type='LONG', c=1, size= 4, data[0]: 0x5452494c (1414678860, 'TRIL')Other notifications have not been observed so far.