Nucleo F401REでFM音源を実装するやつ の実装途中で32ポリ音源にしたやつ 外部DACとオペアンプを利用 現在はMCP4922とNJM2737
Dependencies: AOTTrigon I2CEEPROM MCP4922 mbed
Diff: MIDIUtil.cpp
- Revision:
- 7:439c57c20593
- Child:
- 10:0ffdefe75566
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MIDIUtil.cpp Mon Dec 29 02:34:12 2014 +0000 @@ -0,0 +1,135 @@ + +double notenumfreqs[]={ + 8.175799, + 8.661957, + 9.177024, + 9.722718, + 10.300861, + 10.913382, + 11.562326, + 12.249857, + 12.978272, + 13.750000, + 14.567618, + 15.433853, + 16.351598, + 17.323914, + 18.354048, + 19.445436, + 20.601722, + 21.826764, + 23.124651, + 24.499715, + 25.956544, + 27.500000, + 29.135235, + 30.867706, + 32.703196, + 34.647829, + 36.708096, + 38.890873, + 41.203445, + 43.653529, + 46.249303, + 48.999429, + 51.913087, + 55.000000, + 58.270470, + 61.735413, + 65.406391, + 69.295658, + 73.416192, + 77.781746, + 82.406889, + 87.307058, + 92.498606, + 97.998859, + 103.826174, + 110.000000, + 116.540940, + 123.470825, + 130.812783, + 138.591315, + 146.832384, + 155.563492, + 164.813778, + 174.614116, + 184.997211, + 195.997718, + 207.652349, + 220.000000, + 233.081881, + 246.941651, + 261.625565, + 277.182631, + 293.664768, + 311.126984, + 329.627557, + 349.228231, + 369.994423, + 391.995436, + 415.304698, + 440.000000, + 466.163762, + 493.883301, + 523.251131, + 554.365262, + 587.329536, + 622.253967, + 659.255114, + 698.456463, + 739.988845, + 783.990872, + 830.609395, + 880.000000, + 932.327523, + 987.766603, + 1046.502261, + 1108.730524, + 1174.659072, + 1244.507935, + 1318.510228, + 1396.912926, + 1479.977691, + 1567.981744, + 1661.218790, + 1760.000000, + 1864.655046, + 1975.533205, + 2093.004522, + 2217.461048, + 2349.318143, + 2489.015870, + 2637.020455, + 2793.825851, + 2959.955382, + 3135.963488, + 3322.437581, + 3520.000000, + 3729.310092, + 3951.066410, + 4186.009045, + 4434.922096, + 4698.636287, + 4978.031740, + 5274.040911, + 5587.651703, + 5919.910763, + 6271.926976, + 6644.875161, + 7040.000000, + 7458.620184, + 7902.132820, + 8372.018090, + 8869.844191, + 9397.272573, + 9956.063479, + 10548.081821, + 11175.303406, + 11839.821527, + 12543.853951 +}; + +inline double getNoteNumberFrequency(int nn) { + return notenumfreqs[nn]; +} \ No newline at end of file