2017-04-15 17:45:13 +00:00
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# Apple 2 Mockingboard Test
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Play a single note on both the left and right channels A.
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Source: 6502 Assembly
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2017-04-16 07:23:24 +00:00
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# Mockingboard Tone <-> Frequency Table
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See `freq.c`
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```
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Note Frequency Tone reproduced Relative Error
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2017-04-17 12:48:06 +00:00
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A0 27.500 Hz -> $090F ~ 27.503 Hz (0.012 %)
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A0# 29.135 Hz -> $088D ~ 29.137 Hz (0.005 %)
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B0 30.868 Hz -> $0812 ~ 30.871 Hz (0.012 %)
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C1 32.703 Hz -> $079E ~ 32.708 Hz (0.014 %)
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C1# 34.648 Hz -> $0730 ~ 34.663 Hz (0.044 %)
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D1 36.708 Hz -> $06C9 ~ 36.719 Hz (0.029 %)
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D1# 38.891 Hz -> $0667 ~ 38.914 Hz (0.060 %)
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E1 41.203 Hz -> $060B ~ 41.228 Hz (0.060 %)
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F1 43.654 Hz -> $05B5 ~ 43.655 Hz (0.004 %)
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F1# 46.249 Hz -> $0563 ~ 46.251 Hz (0.004 %)
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G1 48.999 Hz -> $0515 ~ 49.024 Hz (0.050 %)
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G1# 51.913 Hz -> $04CC ~ 51.938 Hz (0.049 %)
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A1 55.000 Hz -> $0487 ~ 55.030 Hz (0.055 %)
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A1# 58.270 Hz -> $0446 ~ 58.300 Hz (0.051 %)
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B1 61.735 Hz -> $0409 ~ 61.743 Hz (0.012 %)
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C2 65.406 Hz -> $03CF ~ 65.416 Hz (0.014 %)
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C2# 69.296 Hz -> $0398 ~ 69.326 Hz (0.044 %)
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D2 73.416 Hz -> $0364 ~ 73.480 Hz (0.086 %)
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D2# 77.782 Hz -> $0333 ~ 77.876 Hz (0.121 %)
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E2 82.407 Hz -> $0305 ~ 82.510 Hz (0.125 %)
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F2 87.307 Hz -> $02DA ~ 87.370 Hz (0.072 %)
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F2# 92.499 Hz -> $02B1 ~ 92.569 Hz (0.076 %)
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G2 97.999 Hz -> $028A ~ 98.123 Hz (0.127 %)
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G2# 103.826 Hz -> $0266 ~ 103.877 Hz (0.049 %)
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A2 110.000 Hz -> $0243 ~ 110.156 Hz (0.142 %)
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A2# 116.541 Hz -> $0223 ~ 116.600 Hz (0.051 %)
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B2 123.471 Hz -> $0204 ~ 123.605 Hz (0.109 %)
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C3 130.813 Hz -> $01E7 ~ 130.966 Hz (0.117 %)
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C3# 138.591 Hz -> $01CC ~ 138.653 Hz (0.044 %)
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D3 146.832 Hz -> $01B2 ~ 146.959 Hz (0.086 %)
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D3# 155.563 Hz -> $0199 ~ 155.942 Hz (0.243 %)
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E3 164.814 Hz -> $0182 ~ 165.234 Hz (0.255 %)
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F3 174.614 Hz -> $016D ~ 174.740 Hz (0.072 %)
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F3# 184.997 Hz -> $0158 ~ 185.408 Hz (0.222 %)
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G3 195.998 Hz -> $0145 ~ 196.247 Hz (0.127 %)
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G3# 207.652 Hz -> $0133 ~ 207.753 Hz (0.049 %)
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A3 220.000 Hz -> $0121 ~ 220.693 Hz (0.315 %)
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A3# 233.082 Hz -> $0111 ~ 233.627 Hz (0.234 %)
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B3 246.942 Hz -> $0102 ~ 247.210 Hz (0.109 %)
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C4 261.626 Hz -> $00F3 ~ 262.470 Hz (0.323 %)
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C4# 277.183 Hz -> $00E6 ~ 277.306 Hz (0.044 %)
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D4 293.665 Hz -> $00D9 ~ 293.918 Hz (0.086 %)
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D4# 311.127 Hz -> $00CC ~ 312.648 Hz (0.489 %)
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E4 329.628 Hz -> $00C1 ~ 330.468 Hz (0.255 %)
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F4 349.228 Hz -> $00B6 ~ 350.441 Hz (0.347 %)
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F4# 369.994 Hz -> $00AC ~ 370.816 Hz (0.222 %)
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G4 391.995 Hz -> $00A2 ~ 393.705 Hz (0.436 %)
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G4# 415.305 Hz -> $0099 ~ 416.865 Hz (0.376 %)
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A4 440.000 Hz -> $0090 ~ 442.919 Hz (0.663 %)
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A4# 466.164 Hz -> $0088 ~ 468.973 Hz (0.603 %)
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B4 493.883 Hz -> $0081 ~ 494.421 Hz (0.109 %)
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C5 523.251 Hz -> $0079 ~ 527.110 Hz (0.737 %)
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C5# 554.365 Hz -> $0073 ~ 554.611 Hz (0.044 %)
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D5 587.330 Hz -> $006C ~ 590.558 Hz (0.550 %)
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D5# 622.254 Hz -> $0066 ~ 625.297 Hz (0.489 %)
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E5 659.255 Hz -> $0060 ~ 664.378 Hz (0.777 %)
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F5 698.456 Hz -> $005B ~ 700.882 Hz (0.347 %)
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F5# 739.989 Hz -> $0056 ~ 741.631 Hz (0.222 %)
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G5 783.991 Hz -> $0051 ~ 787.411 Hz (0.436 %)
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G5# 830.609 Hz -> $004C ~ 839.214 Hz (1.036 %)
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A5 880.000 Hz -> $0048 ~ 885.837 Hz (0.663 %)
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A5# 932.328 Hz -> $0044 ~ 937.945 Hz (0.603 %)
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B5 987.767 Hz -> $0040 ~ 996.567 Hz (0.891 %)
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C6 1046.502 Hz -> $003C ~1063.005 Hz (1.577 %)
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C6# 1108.731 Hz -> $0039 ~1118.952 Hz (0.922 %)
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D6 1174.659 Hz -> $0036 ~1181.116 Hz (0.550 %)
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D6# 1244.508 Hz -> $0033 ~1250.594 Hz (0.489 %)
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E6 1318.510 Hz -> $0030 ~1328.756 Hz (0.777 %)
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F6 1396.913 Hz -> $002D ~1417.339 Hz (1.462 %)
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F6# 1479.978 Hz -> $002B ~1483.262 Hz (0.222 %)
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G6 1567.982 Hz -> $0028 ~1594.507 Hz (1.692 %)
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G6# 1661.219 Hz -> $0026 ~1678.428 Hz (1.036 %)
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A6 1760.000 Hz -> $0024 ~1771.674 Hz (0.663 %)
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A6# 1864.655 Hz -> $0022 ~1875.890 Hz (0.603 %)
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B6 1975.533 Hz -> $0020 ~1993.133 Hz (0.891 %)
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C7 2093.005 Hz -> $001E ~2126.009 Hz (1.577 %)
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C7# 2217.461 Hz -> $001C ~2277.867 Hz (2.724 %)
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D7 2349.318 Hz -> $001B ~2362.232 Hz (0.550 %)
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D7# 2489.016 Hz -> $0019 ~2551.211 Hz (2.499 %)
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E7 2637.020 Hz -> $0018 ~2657.511 Hz (0.777 %)
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F7 2793.826 Hz -> $0016 ~2899.103 Hz (3.768 %)
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F7# 2959.955 Hz -> $0015 ~3037.156 Hz (2.608 %)
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G7 3135.963 Hz -> $0014 ~3189.014 Hz (1.692 %)
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G7# 3322.438 Hz -> $0013 ~3356.856 Hz (1.036 %)
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A7 3520.000 Hz -> $0012 ~3543.348 Hz (0.663 %)
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A7# 3729.310 Hz -> $0011 ~3751.781 Hz (0.603 %)
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B7 3951.066 Hz -> $0010 ~3986.267 Hz (0.891 %)
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C8 4186.009 Hz -> $000F ~4252.018 Hz (1.577 %)
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C8# 4434.922 Hz -> $000E ~4555.734 Hz (2.724 %)
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D8 4698.636 Hz -> $000D ~4906.175 Hz (4.417 %)
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D8# 4978.032 Hz -> $000C ~5315.023 Hz (6.770 %)
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E8 5274.041 Hz -> $000C ~5315.023 Hz (0.777 %)
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F8 5587.652 Hz -> $000B ~5798.206 Hz (3.768 %)
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F8# 5919.911 Hz -> $000A ~6378.027 Hz (7.739 %)
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G8 6271.927 Hz -> $000A ~6378.027 Hz (1.692 %)
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G8# 6644.875 Hz -> $0009 ~7086.697 Hz (6.649 %)
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2017-04-16 07:23:24 +00:00
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```
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