  - SystemCommand: 
     differ from system to system
 */
-enum AKMidiStatus: Int {
+public enum AKMidiStatus: Int {
     /// Note off is something resembling a keyboard key release
     case NoteOff = 8
     /// Note on is triggered when a new note is created, or a keyboard key press

    /// Continuous Controller Number 31
    case CC31 = 31
}
func CheckError(error: OSStatus) {
    if error == 0 {return}
    switch error {
    // AudioToolbox

 - ActiveSensing: Active Sensing
 - SysReset: System Reset
 */
public enum AKMidiSystemCommand: UInt8 {
    /// Trivial Case of None
    case None = 0
    /// System Exclusive
