An electronic module has an enclosure which is mechanically and electrically compatible with a plurality of receiving devices such as amplifiers, computers, mixer consoles, and musical instruments. The module has a programmable control panel and display on the enclosure and an electronic circuit disposed within the enclosure and receiving user commands from the control panel and displaying configuration information on the display. The electronic circuit performs a variety of functions for each of the receiving devices by way of a digital signal processor, synthesizer for generating a programmable audio signal in response to a data stream, storage device for storing musical information in a digital format, and playback device for retrieval and playback of the stored musical information. An audio output is coupled for transferring the programmable audio signal to or from the receiving device.