From Encylopedia Judaica:
Al-Gharid Al-Yahudi (early seventh century), poet, singer, and composer from Medina in Arabia. Al-Gharid al-Yahudi is not to be confused with al-Gharid (nickname meaning the fresh voice), one of the four great singers in the early Islamic era (d. 716). The biographical account of al-Gharid the Jew is reported by the 10th-century author al-Isfahani in his monumental Kitab al-Aghani ("Book of Songs"), which contains a collection of poems from the pre-Islamic period to the ninth century, all of which had been set to music. Al-Gharid the Jew is described in this book as a Kohen descended from Aaron ben Amram and a member of the Jewish group living in Yathrib (i.e. Medina, the city of the Prophet Muhammed). Al-Isfahani mentions in the same context other Jewish poets belonging to the same group, but the very fact that he dedicated a special entry to al-Gharid points to his artistic ability and reputation. Al-Isfahani even reports that Muhammad was pleased with one of al-Gharid's songs.
Source: "Al-Gharid Al-Yahudi." Encyclopedia Judaica. Encyclopedia.com