mp3 file transposing

I often change the key of the original (usually unsingable for the congregation). I am making the switch from Planning Center to Planning, and I love the feature in Planning Center that you can upload a music file and use the built in mp3 transposer to alter the key (then it automatically attaches it to the correct "key" with chord chart. From what I see, Planning doesn't have this capability. If the original is in Ab, and I want to do it in F, only the chord chart is transposable. If I want my band to be able to rehearse with the correct key, they can't.

Please include this feature! I know I could jump over to ableton or another software to accomplish this, but it would be super convenient to have it in Planning like it is in Planning Center. 👍🏻

This would be an outstanding feature to add. The music director at my church came from a planning center church is is very much missing this feature.