Likutei Moharan 22:16/ליקוטי מוהר"ן כ״ב:ט״ז

116. And all sounds are the concept of boldness. The voice of the one who rebukes corresponds to the sound of the shofar, as is written (Isaiah 58:1), “Lift up your voice like a shofar.” The same is true of the sound of music, as in (Psalms 33:3), “Play skillfully, with a blast.” The sound of music is synonymous with a TeRuAh (blast)/a shofar, corresponding to, “You TiR’ AeH (shall tend) my people,” as above.