If I may believe http://filext.com/file-extension/mia this is a custom sound format, not recognized by other players.
Why no ask them what they recommend? My guess is that they will answer that their streaming music is not meant to be recorded and converted and uploaded to other sharing sites, because their TOS says something like "only for streaming use". Then it's over.
Kees
host app (Babya Logic) only exports as .midi & then often only as a curtailed file; want to convert direct to .mp3, .aiff, .ogg etc so able to upload to sharing cloud in order to expose my music & the upload protocols demand as one of the above

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