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-Sound
equipmentLesson 9
How to tune and use harmonics...
NOTE.... * DENOTES WHERE THINGS CAN BE FOUND ON YOUR SEQUENCER
Table of Contents
- What does tune to A440hz mean ... ?
- Where can I find harmonics information... ?
- How can we measure harmonics... ?
- Tuning methods ... ?
- Temperature tuning calibration ... ?
- Example ... ?
What does tune to A440hz mean ... ?
[ A440Hz perfect pitch as is A1 55Hz but some keyboards don't go this low that is why we use 440Hz, also for tuning circuitry we use 400Hz linear to calibrate .
]
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Where can I find harmonics information... ?
[ Here ....
| NOTE | FREQUENCY | DEVIATION | PERCENT |
| E.T.S. | E.T.S. | Hz | ERROR |
| A1 | 55.00 | 0.00 | 0.00E+00 |
| A2 | 110.00 | 0.00 | 0.00E+00 |
| E3 | 164.81 | -0.19 | -1.15E-03 |
| A3 | 220.00 | 0.00 | 0.00E+00 |
| C#4 | 277.18 | 2.18 | 7.93E-03 |
| E4 | 329.63 | -0.37 | -1.12E-03 |
| G4 | 392.00 | 7.00 | 1.82E-02 |
| A4 | 440.00 | 0.00 | 0.00E+00 |
| B4 | 493.88 | -1.12 | -2.26E-03 |
| C#5 | 554.37 | 4.37 | 7.95E-03 |
| D#5 | 622.25 | 17.25 | 2.85E-02 |
| E5 | 659.26 | -0.74 | -1.12E-03 |
| F5 | 698.46 | -16.54 | -2.31E-02 |
| G5 | 783.99 | 13.99 | 1.82E-02 |
| G#5 | 830.61 | 5.61 | 6.80E-03 |
| A5 | 880.00 | 0.00 | 0.00E+00 |
| A#5 | 932.33 | -2.67 | -2.86E-03 |
| B5 | 987.77 | -2.23 | -2.25E-03 |
| C6 | 1046.50 | 1.50 | 1.44E-03 |
| C#6 | 1108.73 | 8.73 | 7.94E-03 |
| D6 | 1174.66 | 19.66 | 1.70E-02 |
| D#6 | 1244.51 | 34.51 | 2.85E-02 |
| D#6 | 1244.51 | -20.49 | -1.62E-02 |
| E6 | 1318.51 | -1.49 | -1.13E-03 |
| F6 | 1396.91 | 21.91 | 1.59E-02 |
| F6 | 1396.91 | -33.09 | -2.31E-02 |
| F#6 | 1479.98 | -5.02 | -3.38E-03 |
| G6 | 1567.98 | 27.98 | 1.82E-02 |
| G6 | 1567.98 | -27.02 | -1.69E-02 |
| G#6 | 1661.22 | 11.22 | 6.80E-03 |
| G#6 | 1661.22 | -43.78 | -2.57E-02 |
| A6 | 1760.00 | 0.00 | 0.00E+00 |
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]
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How can we measure harmonics... ?
[ With difficulty is the simple answer, for most musicians the easy way to reference a harmonic is to call it by its lay term either 3rd 5th or 7th.
| OSCILLATIONS | | | ||||||
| | | |||||||
| HARMONIC INTENSITY OF SYMMETRICAL SQUARE WAVE | | | ||||||
| F=100Hz | 1(=f) | | | |||||
| Hz | dB | HARMONIC | | | ||||
| 315 | -11 | 3 | | | ||||
| 550 | -15 | 5 | | | ||||
| 700 | -17 | 7 | | | ||||
| 890 | -19 | 9 | | | ||||
| 1150 | -22 | 11 | | | ||||
| 1400 | -23 | 13 | | | ||||
| 1600 | -24 | 15 | | | ||||
| 1800 | -26 | 17 | | | ||||
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Tuning methods.. ?
[ Most synths today have independent tuning built in so for each note you can choose your frequency association. Older synths modules are stuck in the European tuning mode, A# is exactly the same pitch as Bflat
]
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Temperature tuning calibration... ?
[ To combat temperature the Asian tuning method is preferred.
Here you need to calibrate the # separate to the flat
So A# will have a different frequency to that of Bflat etc.
]
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Example ... ?
[ See frequency deviation chart above.
]