From Edwards Signaling & Security Systems, MEDI-Lite is a conventional application of Edwards’s standard MEDI software system that uses a PC’s sound card as an audio source to sound speakers from a desktop or laptop computer. MEDI-Lite can sound Edwards’ Adaptatone signaling system wav files, custom wav files or real-time voice (using the PC microphone) over conventional 25 or 70V speakers or speaker/amplifiers. Edwards Signaling & Security Systems

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