AlphaTab.Model.TuningParser.GetTuningForText C# (CSharp) Метод

        public static int GetTuningForText(string str)
        {
            var b = 0;
            string note = null;
            int octave = 0;
            var m = TuningRegex.exec(str.ToLower());
            if (m != null)
            {
                note = m[1];
                octave = Std.ParseInt(m[2]);
            }

            if (!note.IsNullOrWhiteSpace())
            {
                switch (note)
                {
                    case "c":
                        b = 0;
                        break;
                    case "db":
                        b = 1;
                        break;
                    case "d":
                        b = 2;
                        break;
                    case "eb":
                        b = 3;
                        break;
                    case "e":
                        b = 4;
                        break;
                    case "f":
                        b = 5;
                        break;
                    case "gb":
                        b = 6;
                        break;
                    case "g":
                        b = 7;
                        break;
                    case "ab":
                        b = 8;
                        break;
                    case "a":
                        b = 9;
                        break;
                    case "bb":
                        b = 10;
                        break;
                    case "b":
                        b = 11;
                        break;
                    default:
                        return -1;
                }

                // add octaves
                b += (octave * 12);

            }
            else
            {
                return -1;
            }
            return b;
        }