Problem
On macOS, Cubase/Nuendo seems to forget already set up audio devices after being restarted. In these cases, you need to reselect the desired audio interface in a dialog box each time you start Cubase/Nuendo.
Cause
A possible reason for this issue can be connected devices like displays or USB-C docks with a built-in audio device. If the connected device provides a new hardware ID for the audio interface after rebooting the system, Cubase/Nuendo assumes a new audio interface is available, and the audio interface selection dialog comes up.
Solution
Since Cubase 9.5.40 / Nuendo 8.3, it has been possible to work around this issue by creating a blacklist for unwanted audio interfaces. Devices on the blacklist will be ignored by Cubase/Nuendo on startup, preventing the selection dialog from reappearing.
Here is how to create the blacklist for unwanted audio devices:
Step 1: Create the folder "CA2ASIO"
First, you need to create a new folder to store the blacklist.
- Quit Cubase/Nuendo.
- In the macOS Finder, go to ~/Library/Preferences/ by following these steps:
- Select "Go" from the Finder menu bar.
- While the "Go" menu is folded out, hold down the "Option" (⌥) key and select "Library".
- Within the newly opened "Library" folder, open the "Preferences" folder.
- Inside the "Preferences" folder, create a new folder (⇧⌘N) and name it "CA2ASIO".
Step 2: Create the blacklist
- Open TextEdit from the "Applications" folder, or any other text editor that supports plain text files (.txt), for example, BBEdit. The following steps refer to TextEdit.
- In TextEdit, create a new file by pressing Command + N (⌘N).
- By default, the new file has a rich text format. Press Shift + Command + T (⇧⌘T) to switch to plain text.
- Enter audio devices that you want Cubase/Nuendo to ignore, one device per line.
The names of the blacklisted audio devices must be typed exactly as shown in the audio interface selection dialog. Alternatively, you can look up the correct device names in Cubase:- Select "Studio Setup..." from the "Studio" menu.
- The "Studio Setup" dialog opens.
- Click on the category "Audio System" on the left.
- All available audio interfaces are listed in the "ASIO Driver"menu on the right.
Save the text file as "ignoreaudiodevice.txt" in the CA2ASIO folder you've created before.
This is the complete path:/Users/username/Library/Preferences/CA2ASIO/ignoreaudiodevice.txt- Start Cubase/Nuendo.
If the blacklist has been set up correctly, Cubase/Nuendo will now ignore unwanted audio interfaces and load the desired driver without prompting you to select an audio device.