data.json5

{
    violin: {
        notes: ['G3', 'D4', 'A4', 'E5'],
        len: {
            '4/4': 12.80,
            '3/4': 11.61,
            '1/4': 9.53,
            '1/16': 7.8,
        },
    },
    viola: {
        notes: ['C3', 'G3', 'D4', 'A4'],
        len: {
            '16"': 14.57,
            '15.5"': 12.36,
        },
    },
    cello: {
        notes: ['C2', 'G2', 'D3', 'A3'],
        len: {
            '4/4': 27.17,
            '3/4': 23.78,
            '1/4': 19.37,
        },
    },
    'double-bass': {
        notes: ['E1', 'A1', 'D2', 'G2'],
        len: {
            '5/4': 44.88,
            '3/4': 41.73,
            '1/2': 37.80,
            '1/4': 35.43,
            '1/8': 31.50,
            '1/10': 27.56,
        },
    },
    guitar: {
        notes: ['E3', 'A3', 'D4', 'G4', 'B4', 'E5'],
        len: {
            '4/4': 26,
            '3/4': 23,
            electric: 25.5,
        },
    },
    'bass-guitar': {
        notes: ['E1', 'A1', 'D2', 'G2', 'B1'],
        len: {
            short: 30,
            standard: 34,
            extra: 36,
        },
    },
    banjo: {
        notes: ['C3', 'G3', 'D4', 'A4', 'G4'],
        len: {
            all: 26.25,
        },
    },
    'tenor-banjo': {
        notes: ['C3', 'G3', 'D4', 'A4'],
        len: {
            all: 22.25,
        },
    },
}