Generally speaking, when learning a musical instrument, when the rhythm is not good and unstable at the beginning, you can use a metronome to help you keep time. The number above [0-240] is the speed of the beat. It is set according to the speed you want to practice at.
The smaller the number, the slower the speed (beat), and the larger the number, the faster the speed. Therefore, I usually choose a slow tempo when practicing the piano. Once you become proficient in playing, gradually adjust the tempo (slowly increase the number).
How to use a metronome:
1. Use a screwdriver to pry open the base of the mechanical metronome you just got. Remove the filling. This is to prevent shock during transportation.
2. You can see the gears inside. After using it for a period of time, you can apply some engine oil to prevent rust (this is a story later).
3. Replace the bottom cover. Stand up on a horizontal surface. Remove the transparent panel.
4. Slide the metal block above to adjust the pendulum. If we set the speed to 80, we need to move the metal block up to the 80 pendulum mark.
5. Adjust the rhythm. Pull out the accent lever. There are numbers on it. The top of the lever is marked 0 2 3 4 6, which represents the number of beats in each measure; for example, 3/4 quarter notes are one beat, and there are 3 beats in each measure, then pull it to 3, and the rhythm you play will cycle every three beats. .
6. There is a rhythm spring on the right side of the metronome. Turn it clockwise. No need to go to the end. There is greater resistance and stop.
7. Pull the pendulum to tilt left or right.
8. Just release your hand. The pendulum has begun to work.
9. Put the metal block down after use, or not. Just cover with the transparent lid and store.
Extended information:
A metronome is an instrument that uses the isochronicity of a pendulum to control the beat sound to keep time.
Take off the metronome panel and you will see a scale. It marks the number of beats (n) emitted per minute when the pendulum vibrates. There is a pendulum on which there is a pendulum that can move up and down. The number of scales corresponding to the position of the pendulum represents the number of beats the pendulum vibrates per minute (one complete vibration has two beats), from which the vibration period (T) of the pendulum can be calculated
T= ( 2×60)/n (seconds)
Changing the position of the pendulum can change its vibration period.
In order to facilitate telling time, a ringing and adjusting lever is installed at the lower part of the metronome wooden box, which can make the ringing sound once every few beats. The time interval (t) can be found by remembering the number of beats of the ringing sound once
t=T/2×R=60/(n/R) (seconds)
R is the number of beats for one ringing sound. By adjusting the position of the lever, you can change the number of beats for one ringing sound. If you don't want the ringing sound, just push the lever all the way in.
Win the spring before use, and be careful not to wind it too tightly. According to the experimental requirements, adjust the beats per minute and ringing frequency. The metronome should be placed horizontally, and the amplitude of the pendulum should not be too large. After use, let the spring relax and pay attention to maintenance.
When using, the timing should start from a certain ringing.
Reference: Baidu Encyclopedia-Metronome