Wrap midi singleton in tvOS check
Wrap midi singleton in tvOS check

eljeff/AudioKit,eljeff/AudioKit,adamnemecek/AudioKit,adamnemecek/AudioKit,adamnemecek/AudioKit,eljeff/AudioKit,audiokit/AudioKit,eljeff/AudioKit,adamnemecek/AudioKit,audiokit/AudioKit,audiokit/AudioKit,audiokit/AudioKit