System requirements and Installation
If your system officially supports Sonoma you will be good to go. If you you have patched an older system with OpenCore Legacy Patcher it is likely to work but it'll depend on how powerfull the CPU is. The lyrics and chords editor will be slow if you have a really old system.
Apple requires apps on the AppStore to be sandboxed. This means the app's data needs to be placed in the Music folder of your home directory or on the iCould-drive and it cannot be moved out of it - even not if you create a symoblic link. For that reason - to save diskspace in your home folder - you may want to considder compressed music formats (like mp3) when setting up a project that has a lot of files playing along.
TODO: get it from the AppStore