Abstract: A lighting display master controller responds to an electronic vibration signal produced by a sensor when an instrument is played, to selectively energize light sources of different colors in a predefined pattern. The master controller energizes specific light sources of a desired color by selecting a row and column within an array. In one embodiment, the light sources are on a flexible substrate disposed within an optically transparent plastic sheath that is attached to the instrument. The pattern applied in selectively energizing light sources can be stored or transmitted in real-time from a concert controller host or personal computer. The light system can also be used to enable a student to practice and record a sequence defined by an instructor. The lights that are energized provide visual cues to the student, and the recording that is made enables the instructor to evaluate the student's performance.

Abstract: A retention system for applying tension to a flexible sheet of material used in a sign system is shown. A support frame can be utilized to couple a material retainer which engages the flexible sheet of material. A tensioning member can be utilized to urge the material retainer into a tensioned position on the support frame. A coupling can be used to couple the tensioning member to the support frame and to allow the tensioning member to rotate about the axis of the hinged coupling, such as through a ball and socket arrangement. A spring arm integral to the support frame can be used to retain the tensioning member against the material retainer as well as to retain the material retainer against the support frame. An audible indication can be produced in establishing the tensioning member in its initial position as well as in establishing the material retainer in the tensioned position.