IMPORTANT: Cubase is available in different versions. The smallest version (Cubase Elements) does not support multi-channel MIDI input. This guide here works for Cubase Artist and Cubase Pro.
You will need a "virtual MIDI cable" to connect Sundog to Cubase.
macOS: Please follow the guide here: http://feelyoursound.com/setup-midi-os-x/
Windows: Please follow the guide here: http://feelyoursound.com/setup-midi-windows/
Please make sure then that the virtual MIDI cable is activated in your Cubase settings!
Basically you set the MIDI Out of Sundog to the virtual MIDI cable, and the MIDI In of Cubase to the virtual MIDI cable as well. Sundog sends MIDI notes on different MIDI channels. This way you can trigger several instruments at once.
You have to set the Cubase tracks to different MIDI channels so that each instrument will respond to separate MIDI note events. To do this, you will need to open the Input Transformer for the chosen instrument (you can find the Input Transformer at the top right of the inspector for each MIDI track). Click on the button and choose "Local" as your target.
At the top of the Input Transformer window, you can select a preset. Choose "Channel Filtering" -> "Pass channel xxx". Select the channel you are interested in.
Then "Enable" the module by clicking on the power button symbol of the current tab (there are several different module tabs in the Input Transformer window).
Now go back to the main Cubase view. Choose your virtual MIDI cable for the input routing of the current track.
Repeat these steps for all channels. When you are ready, you need to select/activate all the different Cubase tracks. You can do this by holding down CTRL on your keyboard and then clicking on the different channels. Alternatively, you can also activate the monitor button for each track.
Please make sure that you don't create a nasty feedback loop with your MIDI connections. Cubase should not send MIDI notes back to Sundog! Otherwise it might happen that these notes will trigger Sundog to instantly send new notes to Cubase as well, and the whole circle starts again.
If you want to use an external MIDI keyboard with your setup you should keep these things in mind:
1) Set Sundog's MIDI In to your external MIDI keyboard
2) Don't use your external MIDI keyboard as an input device in Cubase
Reason: If you use the keyboard in both Sundog and your DAW you will get multiple MIDI note events in your DAW as soon as you press a key. One time from the keyboard itself, the other time when Sundog sends its notes.
I hope this small guide was useful! If you have further questions (or found an error) you can contact me here.