Custom Configuration For Logic Pro X Users
All DAWs handle their I/O assignments differently and feature different facilities to assign USB
outputs from the DAW into your audio interface. Logic Pro X is a great DAW that many people
in Cranborne Audio use regularly, however it does exhibit a few idiosyncrasies that need
addressing before 500R8 can be used to its maximum capabilities.
When the USB output is reassigned using I/O assignments on Logic Pro X, the first two USB
outputs then become unavailable for free patching. This means that without a workaround,
Logic Pro X users are unable to patch audio into the modules installed into slots 1 and 2! Please
note, this is the case with any USB audio interface, not only 500R8!
We do have a workaround that enables access to every path of 500R8 without losing out on
modules 1 and 2. This workaround involves creating an Aggregate Device from within the
Audio MIDI Setup application on macOS.
To create an Aggregate Device:
1. Open ‘Audio MIDI Setup’ on macOS X
2. Select the ‘+’ icon on the bottom left of the window and select ‘Create Aggregate Device’
3. From the list of available audio interfaces, select the Built-In Output and Built-In Inputs
(Selecting them first assigns them to USB channels 1 and 2).
4. After the built-in I/O has been selected, select 500R8 as the last audio device.
5. Select the Clock Source dropdown menu and assign 500R8 as the Clock Source and
select your desired Sample Rate using the Sample Rate drop down.
6. Engage ‘Drift Correction’ for the Built-in I/O and ensure Drift Correction is off for 500R8.
Within Logic Pro X, you can now assign the Aggregate Device to be the default audio interface
by opening the Preferences Page and going into Audio, General, and assigning the input and
output devices to the newly created ‘Aggregate Device’.
This Aggregate Device is now a 30-in/32-out USB audio device and the USB assignments are
offset as follows
USB Input 1 = Built-In Input 1
USB Input 2 = Built-In Input 2
USB Input 3 = 500R8 Slot Input 1
USB Input 4 = 500R8 Slot Input 2
USB Input 5 = 500R8 Slot Input 3
Etc
Now within the ‘I/O assignments’ tab, you can assign the stereo output of Logic Pro X to “USB
Output 10/11”. This output now corresponds with 500R8’s DAW returns and allows stereo
playback from Logic Pro X to be sent out of the DAW returns. With this 2 channel offset in
place, 500R8’s USB channels now display 2 numbers higher than normal and 500R8’s audio
interface channels are now unaffected by Logic Pro X’s patching bug!
500R8 User Manual
-Page 51-
©201
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Cranborne Audio Ltd
