   case standard5String
   case standard6String
   case dropD4String
+  case dropB4String
+  case openA4String
+  case openE4String
+  case e7sus44string
+  case gsus44String
+  case tenor4String
+  case piccolo4String
   case halfStepDown4String
   case halfStepDown5String
   case halfStepDown6String
   case fullStepDown4String
   case fullStepDown5String
+  case eadgcf6String
+  case fbeadg6String
+  case standard7String
+  case fbeadgc7String
+  case standard8String
 
   public var strings: [Note] {
     switch self {

  }
}

// MARK: - BassTuning

/// Four, five and six string tunings for bass guitar.

      return "5 String Standard"
    case .standard6String:
      return "6 String Standard"
    case .standard7String:
      return "7 String standard"
    case .standard8String:
      return "8 String Standard"
    case .dropD4String:
      return "4 String Drop D"
    case .dropB4String:
      return "4 String Drop B"
    case .openA4String:
      return "4 String Open A"
    case .openE4String:
      return "4 String Open E"
    case .e7sus44string:
      return "4 String E7sus4"
    case .gsus44String:
      return "4 String Gsus4"
    case .tenor4String:
      return "4 String Tenor"
    case .piccolo4String:
      return "4 String Piccolo"
    case .halfStepDown4String:
      return "4 String Half Step Down"
    case .halfStepDown5String:
