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teensy-audio/examples/Synthesis/PlaySynthMusic/PlaySynthMusic.h

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  1. 

  2. // Table of midi note frequencies * 2

  3. //   They are times 2 for greater accuracy, yet still fits in a word.

  4. //   Generated from Excel by =ROUND(2*440/32*(2^((x-9)/12)),0) for 0<x<128

  5. // The lowest notes might not work, depending on the Arduino clock frequency

  6. 

  7. // This is for the Teensy Audio library which specifies

  8. // frequencies as floating point. See make_notetab.xlsx

  9. const float tune_frequencies2_PGM[128] =

  10. {

  11.     8.1758,    8.6620,    9.1770,    9.7227,    10.3009,    10.9134,    11.5623,    12.2499,

  12.     12.9783,   13.7500,   14.5676,   15.4339,   16.3516,    17.3239,    18.3540,    19.4454,

  13.     20.6017,   21.8268,   23.1247,   24.4997,   25.9565,    27.5000,    29.1352,    30.8677,

  14.     32.7032,   34.6478,   36.7081,   38.8909,   41.2034,    43.6535,    46.2493,    48.9994,

  15.     51.9131,   55.0000,   58.2705,   61.7354,   65.4064,    69.2957,    73.4162,    77.7817,

  16.     82.4069,   87.3071,   92.4986,   97.9989,   103.8262,   110.0000,   116.5409,   123.4708,

  17.     130.8128,  138.5913,  146.8324,  155.5635,  164.8138,   174.6141,   184.9972,   195.9977,

  18.     207.6523,  220.0000,  233.0819,  246.9417,  261.6256,   277.1826,   293.6648,   311.1270,

  19.     329.6276,  349.2282,  369.9944,  391.9954,  415.3047,   440.0000,   466.1638,   493.8833,

  20.     523.2511,  554.3653,  587.3295,  622.2540,  659.2551,   698.4565,   739.9888,   783.9909,

  21.     830.6094,  880.0000,  932.3275,  987.7666,  1046.5023,  1108.7305,  1174.6591,  1244.5079,

  22.     1318.5102, 1396.9129, 1479.9777, 1567.9817, 1661.2188,  1760.0000,  1864.6550,  1975.5332,

  23.     2093.0045, 2217.4610, 2349.3181, 2489.0159, 2637.0205,  2793.8259,  2959.9554,  3135.9635,

  24.     3322.4376, 3520.0000, 3729.3101, 3951.0664, 4186.0090,  4434.9221,  4698.6363,  4978.0317,

  25.     5274.0409, 5587.6517, 5919.9108, 6271.9270, 6644.8752,  7040.0000,  7458.6202,  7902.1328,

  26.     8372.0181, 8869.8442, 9397.2726, 9956.0635, 10548.0818, 11175.3034, 11839.8215, 12543.8540

  27. };

  28. 

  29. #define CMD_PLAYNOTE	0x90	/* play a note: low nibble is generator #, note is next byte */

  30. #define CMD_STOPNOTE	0x80	/* stop a note: low nibble is generator # */

  31. #define CMD_RESTART	0xe0	/* restart the score from the beginning */

  32. #define CMD_STOP	0xf0	/* stop playing */

  33. 

  34. // User must supply this score array

  35. extern unsigned char score[];