Ondes Martenot

The ondes Martenot ( OHND mar-tə-NOH; French: [ɔ̃d maʁtəno], lit. 'Martenot waves') or ondes musicales (lit. 'musical waves') is an early electronic musical instrument. Early models were played only by moving a ring tied to a wire, creating "wavering" sounds similar to a theremin, but a lateral-vibrato keyboard was soon added. Dynamics and timbre are adjusted using controls in a drawer on the instrument's left side. A player of the ondes Martenot is called an ondist.