Yuu Kobayashi
Nucleo F401REでFM音源を実装するやつ 外部DACとオペアンプを利用 現在はMCP4922とNJM2737
Dependencies: AOTTrigon I2CEEPROM MCP4922 AQM0802A mbed
Fork of
NuMidi401
by 
Yuu Kobayashi
NuFM401
Nucleo F401用の自作ソフトウェアMIDI音源
概要
だいたいそんなもんです。
特徴
- ブレッドボードの上で組める程度には簡単な回路構成
- 外部のDACにMCP4922を採用
- 念のためのボルテージフォロアとしてNJM2737Dを採用
- バンク用EEPROMに24FC1025を採用
- シリアル経由でMIDIデータを受信することで操作
補足
シリアル <=> MIDI のドライバにはHairless-MIDISerialをオススメします。 仮想MIDIケーブルはとりあえずMIDI Yokeで。
Diff: MIDIUtil.cpp
- Revision:
- 10:0ffdefe75566
- Parent:
- 7:439c57c20593
--- a/MIDIUtil.cpp Mon Dec 29 02:42:03 2014 +0000
+++ b/MIDIUtil.cpp Mon Dec 29 09:01:10 2014 +0000
@@ -1,135 +1,131 @@
-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
+float notenumfreqs[]={
+ 8.175799f,
+ 8.661957f,
+ 9.177024f,
+ 9.722718f,
+ 10.300861f,
+ 10.913382f,
+ 11.562326f,
+ 12.249857f,
+ 12.978272f,
+ 13.750000f,
+ 14.567618f,
+ 15.433853f,
+ 16.351598f,
+ 17.323914f,
+ 18.354048f,
+ 19.445436f,
+ 20.601722f,
+ 21.826764f,
+ 23.124651f,
+ 24.499715f,
+ 25.956544f,
+ 27.500000f,
+ 29.135235f,
+ 30.867706f,
+ 32.703196f,
+ 34.647829f,
+ 36.708096f,
+ 38.890873f,
+ 41.203445f,
+ 43.653529f,
+ 46.249303f,
+ 48.999429f,
+ 51.913087f,
+ 55.000000f,
+ 58.270470f,
+ 61.735413f,
+ 65.406391f,
+ 69.295658f,
+ 73.416192f,
+ 77.781746f,
+ 82.406889f,
+ 87.307058f,
+ 92.498606f,
+ 97.998859f,
+ 103.826174f,
+ 110.000000f,
+ 116.540940f,
+ 123.470825f,
+ 130.812783f,
+ 138.591315f,
+ 146.832384f,
+ 155.563492f,
+ 164.813778f,
+ 174.614116f,
+ 184.997211f,
+ 195.997718f,
+ 207.652349f,
+ 220.000000f,
+ 233.081881f,
+ 246.941651f,
+ 261.625565f,
+ 277.182631f,
+ 293.664768f,
+ 311.126984f,
+ 329.627557f,
+ 349.228231f,
+ 369.994423f,
+ 391.995436f,
+ 415.304698f,
+ 440.000000f,
+ 466.163762f,
+ 493.883301f,
+ 523.251131f,
+ 554.365262f,
+ 587.329536f,
+ 622.253967f,
+ 659.255114f,
+ 698.456463f,
+ 739.988845f,
+ 783.990872f,
+ 830.609395f,
+ 880.000000f,
+ 932.327523f,
+ 987.766603f,
+ 1046.502261f,
+ 1108.730524f,
+ 1174.659072f,
+ 1244.507935f,
+ 1318.510228f,
+ 1396.912926f,
+ 1479.977691f,
+ 1567.981744f,
+ 1661.218790f,
+ 1760.000000f,
+ 1864.655046f,
+ 1975.533205f,
+ 2093.004522f,
+ 2217.461048f,
+ 2349.318143f,
+ 2489.015870f,
+ 2637.020455f,
+ 2793.825851f,
+ 2959.955382f,
+ 3135.963488f,
+ 3322.437581f,
+ 3520.000000f,
+ 3729.310092f,
+ 3951.066410f,
+ 4186.009045f,
+ 4434.922096f,
+ 4698.636287f,
+ 4978.031740f,
+ 5274.040911f,
+ 5587.651703f,
+ 5919.910763f,
+ 6271.926976f,
+ 6644.875161f,
+ 7040.000000f,
+ 7458.620184f,
+ 7902.132820f,
+ 8372.018090f,
+ 8869.844191f,
+ 9397.272573f,
+ 9956.063479f,
+ 10548.081821f,
+ 11175.303406f,
+ 11839.821527f,
+ 12543.853951f
+};
\ No newline at end of file