A pair of cranes listening to a

 It's a short piece of Qin music with peacefulness and great elegance. When playing it on a tranquil night, it seems as if the Qin practitioner were on the mountain rock, listening to the rhythmic creek so that his mind is purified.                                       

听泉短曲耳，宽转平和，音节大雅，静夜以中音奏之，何异置身磴间，听山溜清韵，洗涤尘襟。