Re: AUGraphicEQ parameters
Re: AUGraphicEQ parameters
- Subject: Re: AUGraphicEQ parameters
- From: Chris Rogers <email@hidden>
- Date: Wed, 1 Jun 2005 17:25:04 -0700
Hi all, I'm new on the list.
I need to equalize music, so I've thought of AUGraphicEQ (aufx greq
appl) unit, but i've searched for hours and didn't found any
information about how to manipulate its parameters. In the "Core
Audio Reference" document, where it's supposed to be all the
parameters for all audio units, there is no info at all :(
If you have the 'auval' command-line tool (this will always be
installed on Tiger systems) then you can use it to find out:
auval -v aufx greq appl
Among lots of other information, it will give you a list of the
published parameters for the graphic EQ, the parameter ID numbers and
so on.
This should work for any AudioUnit by the way, not just AUGraphicEQ.
Perhaps there is no possibility of handling the parameters in the
code? If that's the case, as I need to equalize only three bands
(as in the DJ mixing tables), putting serially three parametriq eq
AU's would be CPU-killer? What I could do instead?
Regards, and sorry for my bad english :)
You *will* be able to control the parameters by using the paramIDs as
displayed by 'auval'.
Three AUParametricEQs in series will also work and should be more
efficient than AUGraphicEQ, though either choice should be pretty light
on the CPU.
Chris Rogers
Core Audio
Apple Computer
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