Hi zainali123,
Thanks for your message.
Apple’s Inter-App Audio format is limited to load the same app once.
Therefore it is not possible to use or load the same app on several tracks.
Here is a tutorial regarding Inter-App Audio in Cubasis: How to Use and Set-up Inter-App Audio in Cubasis | Getting Started with Cubasis - YouTube
Please have a look at our forum article also, that explains the limitations of inter-app audio: Limitations of Inter-App Audio - Cubasis - Steinberg Forums
In this regard, it might be worth to take a look at Apple’s Audio Unit format, which comes with much less limitations (and can be seen as the successor of IAA more or less). Audio Unit support is feature at around 6:45 minutes in the following tutorial: How to Make a Musical Loop in Cubasis | Getting Started with Cubasis - YouTube
Please note that we’ve implemented both formats quite a while ago, which is the reason why Cubasis might look different in those tutorials.
Alongside, the app has been updated with many new features and maintenance topics since then.
Hope that helps.
Best,
Lars