Immusical means lacking in musical ability or skill, but there are many antonyms that describe someone with a musical talent. Melodious, harmonious, rhythmic, tuneful, musical, and sonorous are all antonyms of immusical. Someone who is melodious has a beautiful singing voice or can compose beautiful music. Harmony means notes that sound pleasing when played together, and someone who is harmonious can effortlessly keep a beat. A rhythmic person has a great sense of timing and rhythm. Tuneful means having a pleasing melody or being able to play a tune. Someone who is musical has a natural aptitude for music, and sonorous means having a deep, rich sound. All of these words describe someone who is the opposite of immusical.