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quimbs/notes.json

Created March 13, 2015 20:50
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Sample of usage of OscillatorNode in WebAudio API given a set of frequencies that represent different musical notes.
Raw
notes.json
{
"432": [
{
"note":"C0",
"frequency":16.05
},
{
"note":"C#0",
"frequency":17.01
},
{
"note":"D0",
"frequency":18.02
},
{
"note":"D#0",
"frequency":19.09
},
{
"note":"E0",
"frequency":20.23
},
{
"note":"F0",
"frequency":21.43
},
{
"note":"F#0",
"frequency":22.7
},
{
"note":"G0",
"frequency":24.05
},
{
"note":"G#0",
"frequency":25.48
},
{
"note":"A0",
"frequency":27
},
{
"note":"A#0",
"frequency":28.61
},
{
"note":"B0",
"frequency":30.31
},
{
"note":"C1",
"frequency":32.11
},
{
"note":"C#1",
"frequency":34.02
},
{
"note":"D1",
"frequency":36.04
},
{
"note":"D#1",
"frequency":38.18
},
{
"note":"E1",
"frequency":40.45
},
{
"note":"F1",
"frequency":42.86
},
{
"note":"F#1",
"frequency":45.41
},
{
"note":"G1",
"frequency":48.11
},
{
"note":"G#1",
"frequency":50.97
},
{
"note":"A1",
"frequency":54
},
{
"note":"A#1",
"frequency":57.21
},
{
"note":"B1",
"frequency":60.61
},
{
"note":"C2",
"frequency":64.22
},
{
"note":"C#2",
"frequency":68.04
},
{
"note":"D2",
"frequency":72.08
},
{
"note":"D#2",
"frequency":76.37
},
{
"note":"E2",
"frequency":80.91
},
{
"note":"F2",
"frequency":85.72
},
{
"note":"F#2",
"frequency":90.82
},
{
"note":"G2",
"frequency":96.22
},
{
"note":"G#2",
"frequency":101.94
},
{
"note":"A2",
"frequency":108
},
{
"note":"A#2",
"frequency":114.42
},
{
"note":"B2",
"frequency":121.23
},
{
"note":"C3",
"frequency":128.43
},
{
"note":"C#3",
"frequency":136.07
},
{
"note":"D3",
"frequency":144.16
},
{
"note":"D#3",
"frequency":152.74
},
{
"note":"E3",
"frequency":161.82
},
{
"note":"F3",
"frequency":171.44
},
{
"note":"F#3",
"frequency":181.63
},
{
"note":"G3",
"frequency":192.43
},
{
"note":"G#3",
"frequency":203.88
},
{
"note":"A3",
"frequency":216
},
{
"note":"A#3",
"frequency":228.84
},
{
"note":"B3",
"frequency":242.45
},
{
"note":"C4",
"frequency":256.87
},
{
"note":"C#4",
"frequency":272.14
},
{
"note":"D4",
"frequency":288.33
},
{
"note":"D#4",
"frequency":305.47
},
{
"note":"E4",
"frequency":323.63
},
{
"note":"F4",
"frequency":342.88
},
{
"note":"F#4",
"frequency":363.27
},
{
"note":"G4",
"frequency":384.87
},
{
"note":"G#4",
"frequency":407.75
},
{
"note":"A4",
"frequency":432
},
{
"note":"A#4",
"frequency":457.69
},
{
"note":"B4",
"frequency":484.9
},
{
"note":"C5",
"frequency":513.74
},
{
"note":"C#5",
"frequency":544.29
},
{
"note":"D5",
"frequency":576.65
},
{
"note":"D#5",
"frequency":610.94
},
{
"note":"E5",
"frequency":647.27
},
{
"note":"F5",
"frequency":685.76
},
{
"note":"F#5",
"frequency":726.53
},
{
"note":"G5",
"frequency":769.74
},
{
"note":"G#5",
"frequency":815.51
},
{
"note":"A5",
"frequency":864
},
{
"note":"A#5",
"frequency":915.38
},
{
"note":"B5",
"frequency":969.81
},
{
"note":"C6",
"frequency":1027.47
},
{
"note":"C#6",
"frequency":1088.57
},
{
"note":"D6",
"frequency":1153.3
},
{
"note":"D#6",
"frequency":1221.88
},
{
"note":"E6",
"frequency":1294.54
},
{
"note":"F6",
"frequency":1371.51
},
{
"note":"F#6",
"frequency":1453.07
},
{
"note":"G6",
"frequency":1539.47
},
{
"note":"G#6",
"frequency":1631.01
},
{
"note":"A6",
"frequency":1728
},
{
"note":"A#6",
"frequency":1830.75
},
{
"note":"B6",
"frequency":1939.61
},
{
"note":"C7",
"frequency":2054.95
},
{
"note":"C#7",
"frequency":2177.14
},
{
"note":"D7",
"frequency":2306.6
},
{
"note":"D#7",
"frequency":2443.76
},
{
"note":"E7",
"frequency":2589.07
},
{
"note":"F7",
"frequency":2743.03
},
{
"note":"F#7",
"frequency":2906.14
},
{
"note":"G7",
"frequency":3078.95
},
{
"note":"G#7",
"frequency":3262.03
},
{
"note":"A7",
"frequency":3456
},
{
"note":"A#7",
"frequency":3661.5
},
{
"note":"B7",
"frequency":3879.23
},
{
"note":"C8",
"frequency":4109.9
},
{
"note":"C#8",
"frequency":4354.29
},
{
"note":"D8",
"frequency":4613.21
},
{
"note":"D#8",
"frequency":4887.52
},
{
"note":"E8",
"frequency":5178.15
},
{
"note":"F8",
"frequency":5486.06
},
{
"note":"F#8",
"frequency":5812.28
},
{
"note":"G8",
"frequency":6157.89
},
{
"note":"G#8",
"frequency":6524.06
},
{
"note":"A8",
"frequency":6912
},
{
"note":"A#8",
"frequency":7323.01
},
{
"note":"B8",
"frequency":7758.46
}
],
"434": [
{
"note":"C0",
"frequency":16.13
},
{
"note":"C#0",
"frequency":17.09
},
{
"note":"D0",
"frequency":18.1
},
{
"note":"D#0",
"frequency":19.18
},
{
"note":"E0",
"frequency":20.32
},
{
"note":"F0",
"frequency":21.53
},
{
"note":"F#0",
"frequency":22.81
},
{
"note":"G0",
"frequency":24.17
},
{
"note":"G#0",
"frequency":25.6
},
{
"note":"A0",
"frequency":27.12
},
{
"note":"A#0",
"frequency":28.74
},
{
"note":"B0",
"frequency":30.45
},
{
"note":"C1",
"frequency":32.26
},
{
"note":"C#1",
"frequency":34.18
},
{
"note":"D1",
"frequency":36.21
},
{
"note":"D#1",
"frequency":38.36
},
{
"note":"E1",
"frequency":40.64
},
{
"note":"F1",
"frequency":43.06
},
{
"note":"F#1",
"frequency":45.62
},
{
"note":"G1",
"frequency":48.33
},
{
"note":"G#1",
"frequency":51.21
},
{
"note":"A1",
"frequency":54.25
},
{
"note":"A#1",
"frequency":57.48
},
{
"note":"B1",
"frequency":60.89
},
{
"note":"C2",
"frequency":64.51
},
{
"note":"C#2",
"frequency":68.35
},
{
"note":"D2",
"frequency":72.42
},
{
"note":"D#2",
"frequency":76.72
},
{
"note":"E2",
"frequency":81.28
},
{
"note":"F2",
"frequency":86.12
},
{
"note":"F#2",
"frequency":91.24
},
{
"note":"G2",
"frequency":96.66
},
{
"note":"G#2",
"frequency":102.41
},
{
"note":"A2",
"frequency":108.5
},
{
"note":"A#2",
"frequency":114.95
},
{
"note":"B2",
"frequency":121.79
},
{
"note":"C3",
"frequency":129.03
},
{
"note":"C#3",
"frequency":136.7
},
{
"note":"D3",
"frequency":144.83
},
{
"note":"D#3",
"frequency":153.44
},
{
"note":"E3",
"frequency":162.57
},
{
"note":"F3",
"frequency":172.23
},
{
"note":"F#3",
"frequency":182.47
},
{
"note":"G3",
"frequency":193.32
},
{
"note":"G#3",
"frequency":204.82
},
{
"note":"A3",
"frequency":217
},
{
"note":"A#3",
"frequency":229.9
},
{
"note":"B3",
"frequency":243.57
},
{
"note":"C4",
"frequency":258.06
},
{
"note":"C#4",
"frequency":273.4
},
{
"note":"D4",
"frequency":289.66
},
{
"note":"D#4",
"frequency":306.88
},
{
"note":"E4",
"frequency":325.13
},
{
"note":"F4",
"frequency":344.47
},
{
"note":"F#4",
"frequency":364.95
},
{
"note":"G4",
"frequency":386.65
},
{
"note":"G#4",
"frequency":409.64
},
{
"note":"A4",
"frequency":434
},
{
"note":"A#4",
"frequency":459.81
},
{
"note":"B4",
"frequency":487.15
},
{
"note":"C5",
"frequency":516.12
},
{
"note":"C#5",
"frequency":546.81
},
{
"note":"D5",
"frequency":579.32
},
{
"note":"D#5",
"frequency":613.77
},
{
"note":"E5",
"frequency":650.27
},
{
"note":"F5",
"frequency":688.93
},
{
"note":"F#5",
"frequency":729.9
},
{
"note":"G5",
"frequency":773.3
},
{
"note":"G#5",
"frequency":819.28
},
{
"note":"A5",
"frequency":868
},
{
"note":"A#5",
"frequency":919.61
},
{
"note":"B5",
"frequency":974.3
},
{
"note":"C6",
"frequency":1032.23
},
{
"note":"C#6",
"frequency":1093.61
},
{
"note":"D6",
"frequency":1158.64
},
{
"note":"D#6",
"frequency":1227.54
},
{
"note":"E6",
"frequency":1300.53
},
{
"note":"F6",
"frequency":1377.86
},
{
"note":"F#6",
"frequency":1459.8
},
{
"note":"G6",
"frequency":1546.6
},
{
"note":"G#6",
"frequency":1638.57
},
{
"note":"A6",
"frequency":1736
},
{
"note":"A#6",
"frequency":1839.23
},
{
"note":"B6",
"frequency":1948.59
},
{
"note":"C7",
"frequency":2064.46
},
{
"note":"C#7",
"frequency":2187.22
},
{
"note":"D7",
"frequency":2317.28
},
{
"note":"D#7",
"frequency":2455.07
},
{
"note":"E7",
"frequency":2601.06
},
{
"note":"F7",
"frequency":2755.73
},
{
"note":"F#7",
"frequency":2919.59
},
{
"note":"G7",
"frequency":3093.2
},
{
"note":"G#7",
"frequency":3277.13
},
{
"note":"A7",
"frequency":3472
},
{
"note":"A#7",
"frequency":3678.46
},
{
"note":"B7",
"frequency":3897.19
},
{
"note":"C8",
"frequency":4128.93
},
{
"note":"C#8",
"frequency":4374.44
},
{
"note":"D8",
"frequency":4634.56
},
{
"note":"D#8",
"frequency":4910.15
},
{
"note":"E8",
"frequency":5202.12
},
{
"note":"F8",
"frequency":5511.46
},
{
"note":"F#8",
"frequency":5839.18
},
{
"note":"G8",
"frequency":6186.4
},
{
"note":"G#8",
"frequency":6554.26
},
{
"note":"A8",
"frequency":6944
},
{
"note":"A#8",
"frequency":7356.91
},
{
"note":"B8",
"frequency":7794.38
}
],
"436": [
{
"note":"C0",
"frequency":16.2
},
{
"note":"C#0",
"frequency":17.17
},
{
"note":"D0",
"frequency":18.19
},
{
"note":"D#0",
"frequency":19.27
},
{
"note":"E0",
"frequency":20.41
},
{
"note":"F0",
"frequency":21.63
},
{
"note":"F#0",
"frequency":22.91
},
{
"note":"G0",
"frequency":24.28
},
{
"note":"G#0",
"frequency":25.72
},
{
"note":"A0",
"frequency":27.25
},
{
"note":"A#0",
"frequency":28.87
},
{
"note":"B0",
"frequency":30.59
},
{
"note":"C1",
"frequency":32.41
},
{
"note":"C#1",
"frequency":34.33
},
{
"note":"D1",
"frequency":36.37
},
{
"note":"D#1",
"frequency":38.54
},
{
"note":"E1",
"frequency":40.83
},
{
"note":"F1",
"frequency":43.26
},
{
"note":"F#1",
"frequency":45.83
},
{
"note":"G1",
"frequency":48.55
},
{
"note":"G#1",
"frequency":51.44
},
{
"note":"A1",
"frequency":54.5
},
{
"note":"A#1",
"frequency":57.74
},
{
"note":"B1",
"frequency":61.17
},
{
"note":"C2",
"frequency":64.81
},
{
"note":"C#2",
"frequency":68.67
},
{
"note":"D2",
"frequency":72.75
},
{
"note":"D#2",
"frequency":77.07
},
{
"note":"E2",
"frequency":81.66
},
{
"note":"F2",
"frequency":86.51
},
{
"note":"F#2",
"frequency":91.66
},
{
"note":"G2",
"frequency":97.11
},
{
"note":"G#2",
"frequency":102.88
},
{
"note":"A2",
"frequency":109
},
{
"note":"A#2",
"frequency":115.48
},
{
"note":"B2",
"frequency":122.35
},
{
"note":"C3",
"frequency":129.62
},
{
"note":"C#3",
"frequency":137.33
},
{
"note":"D3",
"frequency":145.5
},
{
"note":"D#3",
"frequency":154.15
},
{
"note":"E3",
"frequency":163.32
},
{
"note":"F3",
"frequency":173.03
},
{
"note":"F#3",
"frequency":183.32
},
{
"note":"G3",
"frequency":194.22
},
{
"note":"G#3",
"frequency":205.76
},
{
"note":"A3",
"frequency":218
},
{
"note":"A#3",
"frequency":230.96
},
{
"note":"B3",
"frequency":244.7
},
{
"note":"C4",
"frequency":259.25
},
{
"note":"C#4",
"frequency":274.66
},
{
"note":"D4",
"frequency":290.99
},
{
"note":"D#4",
"frequency":308.3
},
{
"note":"E4",
"frequency":326.63
},
{
"note":"F4",
"frequency":346.05
},
{
"note":"F#4",
"frequency":366.63
},
{
"note":"G4",
"frequency":388.43
},
{
"note":"G#4",
"frequency":411.53
},
{
"note":"A4",
"frequency":436
},
{
"note":"A#4",
"frequency":461.93
},
{
"note":"B4",
"frequency":489.39
},
{
"note":"C5",
"frequency":518.49
},
{
"note":"C#5",
"frequency":549.33
},
{
"note":"D5",
"frequency":581.99
},
{
"note":"D#5",
"frequency":616.6
},
{
"note":"E5",
"frequency":653.26
},
{
"note":"F5",
"frequency":692.11
},
{
"note":"F#5",
"frequency":733.26
},
{
"note":"G5",
"frequency":776.86
},
{
"note":"G#5",
"frequency":823.06
},
{
"note":"A5",
"frequency":872
},
{
"note":"A#5",
"frequency":923.85
},
{
"note":"B5",
"frequency":978.79
},
{
"note":"C6",
"frequency":1036.99
},
{
"note":"C#6",
"frequency":1098.65
},
{
"note":"D6",
"frequency":1163.98
},
{
"note":"D#6",
"frequency":1233.19
},
{
"note":"E6",
"frequency":1306.52
},
{
"note":"F6",
"frequency":1384.21
},
{
"note":"F#6",
"frequency":1466.52
},
{
"note":"G6",
"frequency":1553.73
},
{
"note":"G#6",
"frequency":1646.12
},
{
"note":"A6",
"frequency":1744
},
{
"note":"A#6",
"frequency":1847.7
},
{
"note":"B6",
"frequency":1957.57
},
{
"note":"C7",
"frequency":2073.98
},
{
"note":"C#7",
"frequency":2197.3
},
{
"note":"D7",
"frequency":2327.96
},
{
"note":"D#7",
"frequency":2466.39
},
{
"note":"E7",
"frequency":2613.05
},
{
"note":"F7",
"frequency":2768.43
},
{
"note":"F#7",
"frequency":2933.05
},
{
"note":"G7",
"frequency":3107.45
},
{
"note":"G#7",
"frequency":3292.23
},
{
"note":"A7",
"frequency":3488
},
{
"note":"A#7",
"frequency":3695.41
},
{
"note":"B7",
"frequency":3915.15
},
{
"note":"C8",
"frequency":4147.95
},
{
"note":"C#8",
"frequency":4394.6
},
{
"note":"D8",
"frequency":4655.92
},
{
"note":"D#8",
"frequency":4932.78
},
{
"note":"E8",
"frequency":5226.09
},
{
"note":"F8",
"frequency":5536.85
},
{
"note":"F#8",
"frequency":5866.09
},
{
"note":"G8",
"frequency":6214.91
},
{
"note":"G#8",
"frequency":6584.47
},
{
"note":"A8",
"frequency":6976
},
{
"note":"A#8",
"frequency":7390.81
},
{
"note":"B8",
"frequency":7830.3
}
],
"438": [
{
"note":"C0",
"frequency":16.28
},
{
"note":"C#0",
"frequency":17.25
},
{
"note":"D0",
"frequency":18.27
},
{
"note":"D#0",
"frequency":19.36
},
{
"note":"E0",
"frequency":20.51
},
{
"note":"F0",
"frequency":21.73
},
{
"note":"F#0",
"frequency":23.02
},
{
"note":"G0",
"frequency":24.39
},
{
"note":"G#0",
"frequency":25.84
},
{
"note":"A0",
"frequency":27.38
},
{
"note":"A#0",
"frequency":29
},
{
"note":"B0",
"frequency":30.73
},
{
"note":"C1",
"frequency":32.55
},
{
"note":"C#1",
"frequency":34.49
},
{
"note":"D1",
"frequency":36.54
},
{
"note":"D#1",
"frequency":38.71
},
{
"note":"E1",
"frequency":41.02
},
{
"note":"F1",
"frequency":43.46
},
{
"note":"F#1",
"frequency":46.04
},
{
"note":"G1",
"frequency":48.78
},
{
"note":"G#1",
"frequency":51.68
},
{
"note":"A1",
"frequency":54.75
},
{
"note":"A#1",
"frequency":58.01
},
{
"note":"B1",
"frequency":61.45
},
{
"note":"C2",
"frequency":65.11
},
{
"note":"C#2",
"frequency":68.98
},
{
"note":"D2",
"frequency":73.08
},
{
"note":"D#2",
"frequency":77.43
},
{
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"frequency":746.72
},
{
"note":"G5",
"frequency":791.12
},
{
"note":"G#5",
"frequency":838.16
},
{
"note":"A5",
"frequency":888
},
{
"note":"A#5",
"frequency":940.8
},
{
"note":"B5",
"frequency":996.75
},
{
"note":"C6",
"frequency":1056.02
},
{
"note":"C#6",
"frequency":1118.81
},
{
"note":"D6",
"frequency":1185.34
},
{
"note":"D#6",
"frequency":1255.82
},
{
"note":"E6",
"frequency":1330.5
},
{
"note":"F6",
"frequency":1409.61
},
{
"note":"F#6",
"frequency":1493.43
},
{
"note":"G6",
"frequency":1582.24
},
{
"note":"G#6",
"frequency":1676.32
},
{
"note":"A6",
"frequency":1776
},
{
"note":"A#6",
"frequency":1881.61
},
{
"note":"B6",
"frequency":1993.49
},
{
"note":"C7",
"frequency":2112.03
},
{
"note":"C#7",
"frequency":2237.62
},
{
"note":"D7",
"frequency":2370.67
},
{
"note":"D#7",
"frequency":2511.64
},
{
"note":"E7",
"frequency":2660.99
},
{
"note":"F7",
"frequency":2819.22
},
{
"note":"F#7",
"frequency":2986.86
},
{
"note":"G7",
"frequency":3164.47
},
{
"note":"G#7",
"frequency":3352.64
},
{
"note":"A7",
"frequency":3552
},
{
"note":"A#7",
"frequency":3763.21
},
{
"note":"B7",
"frequency":3986.99
},
{
"note":"C8",
"frequency":4224.06
},
{
"note":"C#8",
"frequency":4475.24
},
{
"note":"D8",
"frequency":4741.35
},
{
"note":"D#8",
"frequency":5023.29
},
{
"note":"E8",
"frequency":5321.99
},
{
"note":"F8",
"frequency":5638.45
},
{
"note":"F#8",
"frequency":5973.73
},
{
"note":"G8",
"frequency":6328.94
},
{
"note":"G#8",
"frequency":6705.28
},
{
"note":"A8",
"frequency":7104
},
{
"note":"A#8",
"frequency":7526.43
},
{
"note":"B8",
"frequency":7973.97
}
],
"446": [
{
"note":"C0",
"frequency":16.57
},
{
"note":"C#0",
"frequency":17.56
},
{
"note":"D0",
"frequency":18.6
},
{
"note":"D#0",
"frequency":19.71
},
{
"note":"E0",
"frequency":20.88
},
{
"note":"F0",
"frequency":22.12
},
{
"note":"F#0",
"frequency":23.44
},
{
"note":"G0",
"frequency":24.83
},
{
"note":"G#0",
"frequency":26.31
},
{
"note":"A0",
"frequency":27.88
},
{
"note":"A#0",
"frequency":29.53
},
{
"note":"B0",
"frequency":31.29
},
{
"note":"C1",
"frequency":33.15
},
{
"note":"C#1",
"frequency":35.12
},
{
"note":"D1",
"frequency":37.21
},
{
"note":"D#1",
"frequency":39.42
},
{
"note":"E1",
"frequency":41.77
},
{
"note":"F1",
"frequency":44.25
},
{
"note":"F#1",
"frequency":46.88
},
{
"note":"G1",
"frequency":49.67
},
{
"note":"G#1",
"frequency":52.62
},
{
"note":"A1",
"frequency":55.75
},
{
"note":"A#1",
"frequency":59.07
},
{
"note":"B1",
"frequency":62.58
},
{
"note":"C2",
"frequency":66.3
},
{
"note":"C#2",
"frequency":70.24
},
{
"note":"D2",
"frequency":74.42
},
{
"note":"D#2",
"frequency":78.84
},
{
"note":"E2",
"frequency":83.53
},
{
"note":"F2",
"frequency":88.5
},
{
"note":"F#2",
"frequency":93.76
},
{
"note":"G2",
"frequency":99.34
},
{
"note":"G#2",
"frequency":105.24
},
{
"note":"A2",
"frequency":111.5
},
{
"note":"A#2",
"frequency":118.13
},
{
"note":"B2",
"frequency":125.15
},
{
"note":"C3",
"frequency":132.6
},
{
"note":"C#3",
"frequency":140.48
},
{
"note":"D3",
"frequency":148.83
},
{
"note":"D#3",
"frequency":157.68
},
{
"note":"E3",
"frequency":167.06
},
{
"note":"F3",
"frequency":177
},
{
"note":"F#3",
"frequency":187.52
},
{
"note":"G3",
"frequency":198.67
},
{
"note":"G#3",
"frequency":210.48
},
{
"note":"A3",
"frequency":223
},
{
"note":"A#3",
"frequency":236.26
},
{
"note":"B3",
"frequency":250.31
},
{
"note":"C4",
"frequency":265.19
},
{
"note":"C#4",
"frequency":280.96
},
{
"note":"D4",
"frequency":297.67
},
{
"note":"D#4",
"frequency":315.37
},
{
"note":"E4",
"frequency":334.12
},
{
"note":"F4",
"frequency":353.99
},
{
"note":"F#4",
"frequency":375.04
},
{
"note":"G4",
"frequency":397.34
},
{
"note":"G#4",
"frequency":420.97
},
{
"note":"A4",
"frequency":446
},
{
"note":"A#4",
"frequency":472.52
},
{
"note":"B4",
"frequency":500.62
},
{
"note":"C5",
"frequency":530.39
},
{
"note":"C#5",
"frequency":561.92
},
{
"note":"D5",
"frequency":595.34
},
{
"note":"D#5",
"frequency":630.74
},
{
"note":"E5",
"frequency":668.24
},
{
"note":"F5",
"frequency":707.98
},
{
"note":"F#5",
"frequency":750.08
},
{
"note":"G5",
"frequency":794.68
},
{
"note":"G#5",
"frequency":841.94
},
{
"note":"A5",
"frequency":892
},
{
"note":"A#5",
"frequency":945.04
},
{
"note":"B5",
"frequency":1001.24
},
{
"note":"C6",
"frequency":1060.77
},
{
"note":"C#6",
"frequency":1123.85
},
{
"note":"D6",
"frequency":1190.68
},
{
"note":"D#6",
"frequency":1261.48
},
{
"note":"E6",
"frequency":1336.49
},
{
"note":"F6",
"frequency":1415.96
},
{
"note":"F#6",
"frequency":1500.16
},
{
"note":"G6",
"frequency":1589.36
},
{
"note":"G#6",
"frequency":1683.87
},
{
"note":"A6",
"frequency":1784
},
{
"note":"A#6",
"frequency":1890.08
},
{
"note":"B6",
"frequency":2002.47
},
{
"note":"C7",
"frequency":2121.54
},
{
"note":"C#7",
"frequency":2247.7
},
{
"note":"D7",
"frequency":2381.35
},
{
"note":"D#7",
"frequency":2522.96
},
{
"note":"E7",
"frequency":2672.98
},
{
"note":"F7",
"frequency":2831.92
},
{
"note":"F#7",
"frequency":3000.32
},
{
"note":"G7",
"frequency":3178.73
},
{
"note":"G#7",
"frequency":3367.74
},
{
"note":"A7",
"frequency":3568
},
{
"note":"A#7",
"frequency":3780.16
},
{
"note":"B7",
"frequency":4004.95
},
{
"note":"C8",
"frequency":4243.09
},
{
"note":"C#8",
"frequency":4495.4
},
{
"note":"D8",
"frequency":4762.71
},
{
"note":"D#8",
"frequency":5045.91
},
{
"note":"E8",
"frequency":5345.96
},
{
"note":"F8",
"frequency":5663.85
},
{
"note":"F#8",
"frequency":6000.64
},
{
"note":"G8",
"frequency":6357.45
},
{
"note":"G#8",
"frequency":6735.49
},
{
"note":"A8",
"frequency":7136
},
{
"note":"A#8",
"frequency":7560.33
},
{
"note":"B8",
"frequency":8009.89
}
]
}
Raw
oscillatorNode.js
var freqTable, baseFreq = 440, currentNodeIndex = 57; // A4 in the array of notes
$.getJSON('notes.json', function(data) {
freqTable = data;
});
var audioContext = new window.AudioContext();
var notesArray = freqTable[baseFreq];
var sourceAudioNode = audioContext.createOscillator();
sourceAudioNode.frequency.value = notesArray[currentNoteIndex].frequency;
sourceAudioNode.connect(audioContext.destination);
sourceAudioNode.start();
// This function is called passing either a +2 or a -2 to increase or decrease
// the A4 frequency we are using as a reference
var changeBaseFreq = function(delta) {
var newBaseFreq = baseFreq + delta;
if(newBaseFreq >= 432 && newBaseFreq <= 446) {
baseFreq = newBaseFreq;
notesArray = freqTable[baseFreq.toString()];
// We set this flag to 'true' when the reference sound feature is enabled
if(isRefSoundPlaying){
// Only change the frequency if we are playing a reference sound, since
// sourceAudioNode will be an instance of OscillatorNode
var newNoteFreq = notesArray[currentNoteIndex].frequency;
sourceAudioNode.frequency.value = newNoteFreq;
}
}
};
// This function is used to change the note we are currently playing, using
// whatever the current set of notes is (changed by the function above)
var changeReferenceSoundNote = function(delta) {
if(isRefSoundPlaying) {
var newNoteIndex = currentNoteIndex + delta;
if(newNoteIndex >= 0 && newNoteIndex < notesArray.length) {
currentNoteIndex = newNoteIndex;
var newNoteFreq = notesArray[currentNoteIndex].frequency;
sourceAudioNode.frequency.value = newNoteFreq;
}
}
};
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