add accurate length to midistatus type
add accurate length to midistatus type

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