Likutei Moharan 225:4/ליקוטי מוהר"ן רכ״ה:ד׳

14. {“My throat is parched, my eyes ache; I pine for my God” (Psalms 69:4) .} This is the aspect of “My throat is parched, my eyes ache.” That is, when the intellect is not perfect, the aspect of “my eyes”—i.e., the intellect—“ache.” Then one has no trust, as explained above. This is the aspect of “my eyes ache; I pine for my God.” As a result, “my throat is parched”—i.e., one does not have the ability to articulate speech, as explained above. However, when a person does have trust and gives charity, he is able to transform the sounds of the tones into words.

2This is the aspect of “one is woken by the sound of the bird, and all the strains of music yiShaChu (are muffled)” (Ecclesiastes 12:4). Our Sages, of blessed memory, explain: all songs are like SiChah (conversation) to him (Shabbat 152a). That is, tones and songs are turned into conversation and speech, as explained above.

3This relates to what they tell about the Baal Shem Tov, of blessed memory. He would hear words from the notes of a violin, for he would turn tones into words, as explained above.