Figure 31 shows a player depressing a clavichord key (middle C).
middle C is obtained in the usual way, from the tuning fork.
It has a harmonic compass from middle C to C above the treble clef, and can go higher, but with difficulty.
The central line of the stave corresponds to the middle C of the piano; the first note of the poem is therefore D.
A tuning-fork, for instance, giving the middle C, vibrates 528 times per second.
If, for instance, the fork gives the tone of middle C on the piano it vibrates 256 times a second.
At middle C—the middle of the range of a piano—there was a momentary spurt of extra volume.
middle C, on the piano, for instance, is made by waves that reach us at the rate of about 256 per second.
For example, gently press down the key of middle C of a piano.
middle C on the piano has a rate of either 256 or 261 a second according to the system used by the tuner.