An electro-acoustically amplified drum mixer or sound level adjuster for amplifying a hollow drum shell having at least one open end, a drumhead spaced from the open end of the said drum shell and supported thereon. One or more microphones are supported on, and positioned within said drum shell and adapted for connection to an external amplifier and speaker. A second or additional microphones may be included with the internal mounting or may be adapted for mounting outside the drum housing. A proximal level adjustment or sound mixing mechanism is located on or near the drum to allow the performer to custom adjust the sound from the microphone(s)

 
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> Pen instrument with controllable whistle

~ 00391