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

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