H: d: by duration
H: a: by audio format
---
-N: addatt
-P: AFS_READ | AFS_WRITE
-D: Add new attribute(s).
-U: addatt attribute1...
-H: This adds new attributes to the attribute table. At most 64
-H: attributes may be defined.
----
T: add
N: add@member@
O: int com_add@member@(struct command_context *cc);