[革胡]即改革大二胡,是民族管弦乐队的低音乐器。外形和音色与大胡相似,不同的是琴筒为园形,琴杆有指板,没有“千斤”而有“山口”,有四条弦,均用牛筋弦,定弦为 CGda,琴弓在弦外。奏法近似大提琴。发音雄厚,低沉,拨弦效果很好。主要演奏和声低音,烘托节奏,有时亦奏旋律,效果比大胡稍好。[低胡]也叫“低音二胡”,是民族管弦乐队中的最低音乐器。外形构造与二胡同,比大胡大一倍以上。低胡的形制不一. [Leather Hu] that the reform of the erhu, is a national orchestra bass instrument. Appearance and tone similar to the big Hu, the difference is the piano for the round garden, piano fingerboard, there is no “Jack” and “Yamaguchi”, there are four strings, are used tendon string, string for the CGda, bow in Outside the string. Method is similar to the cello. Strong pronunciation, low, plectrum works well. The main bass sound bass, contrast rhythm, and sometimes also play melody, the effect is slightly better than Hu. [Low Hu] also known as “bass erhu,” is the lowest in the national orchestra musical instrument. Shape and structure of the same, more than doubled. Low Hu’s different shapes.