You can't keep stepping on the sustain pedal when playing the piano. Not all syllables need sustain. After stepping on the pedal, it only continues the sound played before, and does not continue any playing sound when stepping on the pedal. In this way, one or several tones can be prolonged as needed without causing unnecessary reverberation. This is the most effective way to play polyphonic or complex and exquisite works with harmonic texture.

If the treble part of the piano is extremely complicated, but the left hand has a large span, it is necessary to play the bass (control the harmony rhythm) and extend the bass, so that the pianist can't take care of both sides (because there is no third hand). At this time, the advantage of the left pedal is extremely obvious.

its function is to play out here. The pianist steps on this pedal and then plays the bass, and this bass will be sustained (unlike the right pedal, which makes the sound of the whole piano prolonged at that time). Then, with the support of this bass, he can play the higher-pitched tunes with ease.

Extended information

The sustain pedal is a pedal that liberates the left hand and purposefully reduces the difficulty of playing. In most vertical pianos, the middle pedal is a practice pedal, which lowers a felt between the hammer and the strings to eliminate the loud volume of the piano, which has no practical significance in playing.

Pedal stepping and releasing exercises can adopt the forms of "slow stepping and slow lifting", "fast stepping and fast lifting", "light stepping and fast lifting" and "light stepping and slow lifting" to exercise the flexible and agile change control ability of ankles. Pedal stepping exercise can also be combined with the connection of playing scales or positive triads on the hands. At this time, you can practice with "direct pedal" and "post-sound pedal" respectively.