Undergraduate / 'an erhu' - Extracrricular activity essay for Common App [3]

I have cut about 700 words from the original one, so I wonder whether my language is awkward or I should focus more on a certain point?I would be very appreciate if you can give me any advice on improving my essay!

Although an erhu(Chinese two-string fiddle) player,I was chosen to play zhonghu(bass erhu)in the school Chinese orchestra.
At first I thought it was too easy a task for zhonghu acted a subsidiary role which only has to play staccato notes or long monotone.That idea soon turned out to be wrong. In accord with the main melody, I must catch the very infinitesimal pause to cut in and play in a brief and energetic tone.Playing legato needs to follow the fluctuating mood: making a crescendo as the music climax or a diminuendo when it smooth down.The more I played zhonghu, the more I found its beauty.I realized that zhonghu's low-pitched voice deepened the contrast of rhythms, creating a grand atmosphere for the whole movement.

During the time of being an accompaniment, I learned that even the "simplest" note requires virtuosity and contributes to the harmony of the ensemble, that we shall appreciate every little piece of work, for it has its own value and can make a difference to the whole.