A mouthpiece assembly for a woodwind musical instrument comprising a mouthpiece body defining an air conduit extending therethrough, a reed placement surface defined on the mouthpiece body adjacent said air conduit, a pair of extensions, integral to and extending from the body of the mouthpiece on opposed sides of the reed placement surface with respect to an opening of the air conduit, and a mechanism for selectively applying a compressive force to a reed placed over the opening of the air conduit, with respect to the body of the mouthpiece, generating to a tensile force applied to each of said pair of extensions, to selectively retain the reed in position. The present design provides advantageous acoustic properties for the mouthpiece, and further provides for advantageous placement of an electronic pickup for receiving the output of the instrument.