How to tune erhu?

The pitch of erhu is usually set to a set of small characters on the inner string and a set of small characters on the outer string.

Method:

1, using electronic sound calibrator;

2. Use a tuning fork or a special mouthpiece tuner;

3. Calibrate with the sound of instruments with fixed pitch such as piano, harmonica and sheng;

4. Press the hands-free key on the landline phone. This sound is a, which is the pitch of the erhu outer string.