Hi,
The iOS “Studio Pass” app works only with “VST Connect Pro”.
Studio Pass : Studio Pass for VST Connect im App Store
VST Connect Pro : VST Connect: Remote Recording Lösung | Steinberg
If you want to connect your iOS Device with “VST Connect SE”, you need the “VST Connect Performer” app. Please notice that this app is only available for an iPad.
https://itunes.apple.com/de/app/vst-connect-performer/id897044856?mt=8&ign-mpt=uo%3D2
We are sorry for the 48 kHz issue. This problem is solved in the upcoming “VST Connect Performer version 2.0.40”. It should be released next week.
Have a nice day,
Michael.