Make sure Finder is
active by clicking on its icon in the Dock
Open a new Finder Window
Select "Utilities" from the "Go" Menu
Find Audio MIDI Setup utility, and launch it
Once AMS is open, choose "open aggregate device Editor" from the audio menu.
And you'll see a window like this
button, and a new aggregate device is created.
Double click the highlighted text, and enter a new name for your aggregate
device. I'm going to name mine with the three devices I intend to use so
that it will be easy to see of what this virtual device consists. This might
be important if I were to create several different aggregate devices for
different purposes at a future date.
Now we can select the devices that we wish to add to our Aggregate Device.
Notice that the iMic is listed twice, First as an output device, and then as
an input device. Since we're creating an input device, we're only interested
in the latter.
One important note to mention is that all the devices have to have the same
sample rate to work together. In the case of GarageBand that means a 44.1K
sample rate (See: Setting Sample Rates and Bit Depth)
button, and you can quit Audio MIDI Setup.
Now we are ready to make use of our new aggregate device in GarageBand. Open
tab, and select your new aggregate device from the input popup menu
When GarageBand asks you...
Choose "Yes", wait a moment for the drivers to initialize, and now you can
use any of the channels your Aggregate Devices consists of for multi-track
Mac Topics That May Interest You:
Audio Units Modules (AU) In GarageBand
Installing A New AU In
Using A New Audio Unit Instrument in
GarageBand Aggregate Device
How To Use A New Audio Unit In GB
Adding Audio Units Modules (Instruments)
to GarageBand (Step by Step)
VST & Audio Units Plug-ins in Mac OS X
SM Pro Audio VFX Software for
Intel Mac OS X
How to setup Garage Band,
Sound-flower, IAC, VFX
Apple's Boot Camp
Audacity VST Enabler
WACVST (Windows-Mac VST)
VSTAU Manager (VST to AU Adapter)
How To Use Soundflower
How to capture audio with
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