This is so embarrassing.
I'm working on a project, where I'd like to implement a single dial EQ.
Basically, it is a "treble" control, just like in those old hi-fi amps. A single knob to cut or add more bass and to cut or add more highs, at the same time.
I've done something with a filtergraphs and cascades and such, but it is sooo overkill.
Is there a more simple, more elegant way to do this?