I know I should probably direct this question elsewhere, but thought I stood a better chance of getting a sensible response from this support community.
I have a 38Gb approx Sonos Music Library that comprises a mix of .wma and .m4a files. Occasionally I would like to play this same music on my Sonos Move (and maybe AirPods, too) via the iPhone/AirPlay in the garden where i have no wifi signal. The problem is this requires loading the music into Apple Music, which I am happy to do, since there is plenty of spare memory on the iPhone. Unfortunately, all of the .m4a files import into Music with no problem as you’d expect, but not the .wma files (thanks a bunch Apple!).
I have looked at various file converters to convert the .wma files to .m4a, but they are quite laborious and then do not do a good job of converting the Track and Album art.
Any ideas as to the easiest way to sync the 2 libraries to ensure all album info exists in both places?