The kokyu, having its own music "kokyu honkyoku" (pieces for kokyu composed in the early days), would often participate in the ensemble of Jiuta or Sokyoku from the middle of the Edo period, and this improvised performance also seems to have been in a unison-like style.
胡弓も独自の楽曲である胡弓本曲を持つ一方、江戸中期からしばしば地歌や箏曲の合奏に加わっていたが、やはり即興的にユニゾンに近い状態で合わせられていたらしい。