Harmonica with a bass mechanism, comprising sound dampers (4, 6), which are arranged side by side in several rows, the sound dampers (4, 6) of a row on at least one common first row bearing axis (4.2, 6.2) are stored and isolated over this means can be moved via buttons (9) operable flap actuators, wherein the flap actuators as on upright uprights (19) rotatably mounted rockers (10) with provided guide devices (13) are formed, the rocker pivot axes of the rockers (10) a Tonluftklappenreihe (4.1, 6.1) in each case at least one common second row bearing axis (4.3, 6.3) are mounted, and wherein the first (4.2, 6.2) and the second row bearing axis (4.3, 6.3) are arranged parallel to one another offset in height and sides, the guide device (13) of the first row bearing axis (4.2, 6.2) facing rocker end (22) on the sound damper (4, 6) forcibly guided i St and the positive guidance transverse to the rocker pivot axis extending profiled profiled guide groove (14) for a kinematic conversion of the rotational movement of a rocker (10) in a on the Tonluftklappe (4, 6) running lever mechanism is provided.
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