I like the wings3d approach (which is not an audio
app,
mind you), where the status bar is used to communicate to
the user what options the user interface offers for the
object that the mouse pointer is hovering over.
There are several ways to do so, maybe a status bar, tooltips
or what's this help.
I'd call this "Documentation on demand". It gives you the
right information just in time. A very good thing, IMHO, but
often such things are - even if there are some - more or less
useless, maybe a tooltip which shows "If checked, this option
takes effect" for a checkbox.
The problem is that it is a special challenge to create
reasonable entries for such help systems. Great the wings3d
people have spent the time for it.
Best regards
ce