Hi Tolmie,
I’m not sure if this is possible, but you could try. It depends if Apple offers previous versions of apps on the App Store, in general.
Open the App Store and search for “Music Studio”.
If it appears in the search results, check if the version number is lower than 2.6 (which was the version that required iOS 7).
If it doesn’t appear at all or if the version number is 2.10, Apple doesn’t offer older versions on the App Store.
Best,
Music Studio Support