- lowlevel:
	- we need the DAM:Properties _soon_
	- common src, dst, index cur_
	- common X, X (n_value) names
	- most track* should be renamed to channel*!
	- maybe rename BasicFileStream to BasicStream
	- maybe rename BasicIOStream to BasicPushOStream
	- maybe the other IO abstraction should become BasicPullIOStream ??
	- generic dithering
	- generic de-/interleaving
	- generic rate converting