 private let kPartTypeAcoustic1 = 0x59 // MSB: 89
 private let kPartTypeAcoustic2 = 0xD9
 private let kPartTypeAcoustic3 = 0xDA
-private let kPartTypeAcoustic4 = 0x5C
+private let kPartTypeAcousticTWOrgan = 0x5C
 private let kPartTypeDrumSet1 = 0x56
 private let kPartTypeDrumSet2 = 0xD6
 

		} else if partByte == kPartTypeAcoustic3 {
			mainType = .Acoustic
			subType = .Acoustic3
		} else if partByte == kPartTypeAcoustic4 {
			mainType = .Acoustic
			subType = .Acoustic4
		} else if partByte == kPartTypeDrumSet1 {
			mainType = .DrumSet
			subType = .DrumSet1

	case Acoustic1
	case Acoustic2
	case Acoustic3
	case AcousticTWOrgan
	case DrumSet1
	case DrumSet2
}
