Maraca in the context of "Bomba (Puerto Rico)"

A one-man band is a musician who plays a number of instruments simultaneously using their hands, feet, limbs, and various mechanical or electronic contraptions. One-man bands also often sing while they perform.

The simplest type of "one-man band" is a singer accompanying themselves on acoustic guitar and playing a harmonica mounted in a metal "harp rack" below the mouth. This approach is often taken by buskers and folk music singer-guitarists. More complicated setups may include wind instruments strapped around the neck, a large bass drum mounted on the musician's back with a beater which is connected to a foot pedal, cymbals strapped between the knees or triggered by a pedal mechanism, tambourines and maracas tied to the limbs, and a stringed instrument strapped over the shoulders (e.g., a banjo, ukulele or guitar).

An idiophone is any musical instrument that creates sound primarily by the vibration of the instrument itself, without the use of air flow (as with aerophones), strings (chordophones), membranes (membranophones) or electricity (electrophones). It is the first of the four main divisions in the original Hornbostel–Sachs system of musical instrument classification (see List of idiophones by Hornbostel–Sachs number). The early classification of Victor-Charles Mahillon called this group of instruments autophones. The most common are struck idiophones, or concussion idiophones, which are made to vibrate by being struck, either directly with a stick or hand (like the wood block, singing bowl, steel tongue drum, handpan, triangle or marimba) or indirectly, with scraping or shaking motions (like maracas or flexatone). Various types of bells fall into both categories. A common plucked idiophone is the Jew's harp.

According to Sachs, idiophones

Four Organs is a work for four electronic organs and maraca, composed by Steve Reich in January 1970.