Tune (noun)

1. A melodious succession of musical sounds.
2. A particular setting of the sounds of an instrument or voice for a specific purpose.
3. An arrangement of the sounds of a radio or television station.

Origin:

Middle english, from old english tūn; akin to old high german zūn tune, old english tūnian to tune.

Examples:

1. She hummed a tune as she worked in the garden.
2. He played the piano in perfect tune.
3. The guitar needed to be retuned before the performance.
4. She changed the radio station to find a tune she liked.
5. He played a familiar tune on his flute and the crowd erupted in applause.