Musical seat body and sofa thereof

A sofa, comprising:

• at least one musical seat body, the musical seat body comprising a sofa seat, a backrest, and a headrest, wherein the backrest is connected to the sofa seat, wherein:
• the headrest comprises a central member and two side connecting members, the central member is connected to the backrest, the two side connecting members are hinged to two opposite sides of the central member, each side connecting member is directly or indirectly provided with an audio device, and the side connecting members drive the audio devices to rotate relative to the central member to move the audio devices close to or away from a seated user's ears;
• and
• the headrest has an initial expanded state and a rotationally folded state, wherein in the initial expanded state, the side connecting members and the central member are relatively expanded to cause the headrest to be a flat-spread shape and to position the audio devices away from the seated user's ears;
• and in the rotationally folded state, the side connecting members drive the audio devices to rotate inward relative to the central member to position the audio devices closer to the seated user's ears.