How many keys does an ordinary piano have? How many white keys are there in black keys? What are their arrangement rules?

Intuitively, the keyboard of a piano consists of 88 keys (a few pianos only have 85 keys), including black keys and white keys. Among them, there are 36 black keys and 52 white keys.

If we carefully observe black keys and White Bond, we can easily find the regularity of their distribution and arrangement. Namely: black keys is a group of two and a group of three.

Take the 6 1 key piano as an example: the 6 1 key piano has six groups of keys, of which the first to fifth groups from the left are complete, each group has 12 keys, and the rightmost group is incomplete, with only one key C (that is, dol in C key).

These six groups of keys are, from left to right, big group, small group, small group 1, small group 2, small group 3 and small group 4. Starting from the leftmost key of a large character group, the white keys are C, D, E, F, G, A, B, and 1, 2, 3, 4, 5, 6, 7 among the keys corresponding to C.

Extended data:

1, 45-degree modulation method: This method uses the closed loop of up four and down five in the reference sound group to get the average law of 12, and then expands it by 8 degrees.

2. Three-six-degree tuning method: This method uses more three-six-degree beats, and it is not easy to distinguish the numbers, and then it is extended by eight degrees. It is a common way for domestic manual tuning lawyers.

3. Electronic musical instrument tuning method: This method adopts the principle of electronic waveform sampling, and its software includes YAMAHA and Tunelab. In the case of using high-quality pickups, the software can well assist the calibration and obtain higher accuracy, but some staid people in Andhadhun usually scoff at this.

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