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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A0 27.500 Hz -> $0914 ~ 27.504 Hz (0.016 %)
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A0# 29.135 Hz -> $0891 ~ 29.147 Hz (0.042 %)
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B0 30.868 Hz -> $0816 ~ 30.879 Hz (0.038 %)
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C1 32.703 Hz -> $07A2 ~ 32.713 Hz (0.029 %)
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C1# 34.648 Hz -> $0734 ~ 34.664 Hz (0.047 %)
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D1 36.708 Hz -> $06CD ~ 36.715 Hz (0.018 %)
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D1# 38.891 Hz -> $066B ~ 38.905 Hz (0.036 %)
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E1 41.203 Hz -> $060F ~ 41.212 Hz (0.022 %)
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F1 43.654 Hz -> $05B8 ~ 43.662 Hz (0.018 %)
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F1# 46.249 Hz -> $0566 ~ 46.252 Hz (0.006 %)
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G1 48.999 Hz -> $0518 ~ 49.019 Hz (0.039 %)
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G1# 51.913 Hz -> $04CF ~ 51.926 Hz (0.024 %)
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A1 55.000 Hz -> $048A ~ 55.009 Hz (0.016 %)
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A1# 58.270 Hz -> $0448 ~ 58.322 Hz (0.088 %)
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B1 61.735 Hz -> $040B ~ 61.759 Hz (0.038 %)
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C2 65.406 Hz -> $03D1 ~ 65.425 Hz (0.029 %)
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C2# 69.296 Hz -> $039A ~ 69.328 Hz (0.047 %)
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D2 73.416 Hz -> $0366 ~ 73.472 Hz (0.076 %)
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D2# 77.782 Hz -> $0335 ~ 77.857 Hz (0.097 %)
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E2 82.407 Hz -> $0307 ~ 82.478 Hz (0.086 %)
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F2 87.307 Hz -> $02DC ~ 87.323 Hz (0.018 %)
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F2# 92.499 Hz -> $02B3 ~ 92.504 Hz (0.006 %)
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G2 97.999 Hz -> $028C ~ 98.037 Hz (0.039 %)
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G2# 103.826 Hz -> $0267 ~ 103.936 Hz (0.105 %)
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A2 110.000 Hz -> $0245 ~ 110.018 Hz (0.016 %)
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A2# 116.541 Hz -> $0224 ~ 116.643 Hz (0.088 %)
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B2 123.471 Hz -> $0205 ~ 123.637 Hz (0.135 %)
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C3 130.813 Hz -> $01E8 ~ 130.985 Hz (0.131 %)
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C3# 138.591 Hz -> $01CD ~ 138.656 Hz (0.047 %)
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D3 146.832 Hz -> $01B3 ~ 146.944 Hz (0.076 %)
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D3# 155.563 Hz -> $019A ~ 155.904 Hz (0.219 %)
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E3 164.814 Hz -> $0183 ~ 165.169 Hz (0.216 %)
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F3 174.614 Hz -> $016E ~ 174.646 Hz (0.018 %)
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F3# 184.997 Hz -> $0159 ~ 185.277 Hz (0.151 %)
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G3 195.998 Hz -> $0146 ~ 196.075 Hz (0.039 %)
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G3# 207.652 Hz -> $0133 ~ 208.210 Hz (0.269 %)
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A3 220.000 Hz -> $0122 ~ 220.415 Hz (0.189 %)
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A3# 233.082 Hz -> $0112 ~ 233.286 Hz (0.088 %)
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B3 246.942 Hz -> $0102 ~ 247.754 Hz (0.329 %)
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C4 261.626 Hz -> $00F4 ~ 261.969 Hz (0.131 %)
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C4# 277.183 Hz -> $00E6 ~ 277.915 Hz (0.264 %)
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D4 293.665 Hz -> $00D9 ~ 294.564 Hz (0.306 %)
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D4# 311.127 Hz -> $00CD ~ 311.807 Hz (0.219 %)
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E4 329.628 Hz -> $00C1 ~ 331.194 Hz (0.475 %)
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F4 349.228 Hz -> $00B7 ~ 349.292 Hz (0.018 %)
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F4# 369.994 Hz -> $00AC ~ 371.631 Hz (0.442 %)
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G4 391.995 Hz -> $00A3 ~ 392.150 Hz (0.039 %)
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G4# 415.305 Hz -> $0099 ~ 417.781 Hz (0.596 %)
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A4 440.000 Hz -> $0091 ~ 440.831 Hz (0.189 %)
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A4# 466.164 Hz -> $0089 ~ 466.573 Hz (0.088 %)
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B4 493.883 Hz -> $0081 ~ 495.507 Hz (0.329 %)
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C5 523.251 Hz -> $007A ~ 523.938 Hz (0.131 %)
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C5# 554.365 Hz -> $0073 ~ 555.830 Hz (0.264 %)
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D5 587.330 Hz -> $006C ~ 591.856 Hz (0.771 %)
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D5# 622.254 Hz -> $0066 ~ 626.671 Hz (0.710 %)
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E5 659.255 Hz -> $0060 ~ 665.838 Hz (0.999 %)
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F5 698.456 Hz -> $005B ~ 702.422 Hz (0.568 %)
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F5# 739.989 Hz -> $0056 ~ 743.261 Hz (0.442 %)
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G5 783.991 Hz -> $0051 ~ 789.141 Hz (0.657 %)
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G5# 830.609 Hz -> $004C ~ 841.059 Hz (1.258 %)
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A5 880.000 Hz -> $0048 ~ 887.784 Hz (0.885 %)
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A5# 932.328 Hz -> $0044 ~ 940.007 Hz (0.824 %)
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B5 987.767 Hz -> $0040 ~ 998.757 Hz (1.113 %)
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C6 1046.502 Hz -> $003D ~1047.876 Hz (0.131 %)
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C6# 1108.731 Hz -> $0039 ~1121.411 Hz (1.144 %)
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D6 1174.659 Hz -> $0036 ~1183.712 Hz (0.771 %)
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D6# 1244.508 Hz -> $0033 ~1253.342 Hz (0.710 %)
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E6 1318.510 Hz -> $0030 ~1331.676 Hz (0.999 %)
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F6 1396.913 Hz -> $002D ~1420.454 Hz (1.685 %)
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F6# 1479.978 Hz -> $002B ~1486.522 Hz (0.442 %)
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G6 1567.982 Hz -> $0028 ~1598.011 Hz (1.915 %)
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G6# 1661.219 Hz -> $0026 ~1682.117 Hz (1.258 %)
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A6 1760.000 Hz -> $0024 ~1775.568 Hz (0.885 %)
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A6# 1864.655 Hz -> $0022 ~1880.013 Hz (0.824 %)
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B6 1975.533 Hz -> $0020 ~1997.514 Hz (1.113 %)
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C7 2093.005 Hz -> $001E ~2130.682 Hz (1.800 %)
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C7# 2217.461 Hz -> $001C ~2282.873 Hz (2.950 %)
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D7 2349.318 Hz -> $001B ~2367.424 Hz (0.771 %)
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D7# 2489.016 Hz -> $0019 ~2556.818 Hz (2.724 %)
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E7 2637.020 Hz -> $0018 ~2663.352 Hz (0.999 %)
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F7 2793.826 Hz -> $0016 ~2905.475 Hz (3.996 %)
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F7# 2959.955 Hz -> $0015 ~3043.831 Hz (2.834 %)
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G7 3135.963 Hz -> $0014 ~3196.022 Hz (1.915 %)
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G7# 3322.438 Hz -> $0013 ~3364.234 Hz (1.258 %)
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A7 3520.000 Hz -> $0012 ~3551.136 Hz (0.885 %)
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A7# 3729.310 Hz -> $0011 ~3760.026 Hz (0.824 %)
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B7 3951.066 Hz -> $0010 ~3995.028 Hz (1.113 %)
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C8 4186.009 Hz -> $000F ~4261.363 Hz (1.800 %)
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C8# 4434.922 Hz -> $000E ~4565.746 Hz (2.950 %)
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D8 4698.636 Hz -> $000D ~4916.957 Hz (4.646 %)
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D8# 4978.032 Hz -> $000C ~5326.704 Hz (7.004 %)
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E8 5274.041 Hz -> $000C ~5326.704 Hz (0.999 %)
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F8 5587.652 Hz -> $000B ~5810.950 Hz (3.996 %)
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F8# 5919.911 Hz -> $000A ~6392.045 Hz (7.975 %)
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G8 6271.927 Hz -> $000A ~6392.045 Hz (1.915 %)
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G8# 6644.875 Hz -> $0009 ~7102.272 Hz (6.883 %)
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```
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