     /// System Command
     public var command: AKMIDISystemCommand? {
         if let statusByte = internalData.first {
-            let status = statusByte >> 4
-            if status < 15 {
-                return .none
-            }
             return AKMIDISystemCommand(rawValue: statusByte)
         }
         return nil

        } else if let status = AKMIDIStatusType.from(byte: data[0]) {
            // is regular MIDI status
            let channel = data[0].lowBit
            fillData(status: status, channel: channel ?? 0, bytes: Array(data.dropFirst()))
        } else if let metaType = AKMIDIMetaEventType(rawValue: data[0]) {
            print("is meta event \(metaType.description)")
        }


    /// MIDI Note Number
    public var noteNumber: MIDINoteNumber? {
        if status == .noteOn || status == .noteOff, internalData.count > 1 {
            return MIDINoteNumber(internalData[1])
        }
        return nil
