         } 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()))
+            fillData(status: status, channel: channel, 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 {
            return MIDINoteNumber(internalData[1])
        }
        return nil

    /// System Command
    public var command: AKMIDISystemCommand? {
        if let statusByte = internalData.first {
            return AKMIDISystemCommand(rawValue: statusByte)
        }
        return nil
