Patent ID: 6643372
Filing Date: 2003-11-04
Classification: G10H

Abstract:
An apparatus for joint music production comprising in combination: a remotely separated plurality of means for producing music interconnected by a first and a second phone lines of a public telephone system, wherein the public telephone system has a signal frequency cutoff limiting transmission to a low range; each of the remotely separated means for producing music providing a locally produced first music signal (MSL) with full audio range, the MSL signal impressed on the first phone line of the public telephone system to create a locally produced low-end outbound music signal (LEL); the MSL signal separately interconnected with a first high-pass filter; a first mixer circuit receiving an output of the first high-pass filter and a mixer signal, thereby producing a locally produced sum/difference signal (SDL) impressed onto the second phone line of the public telephone system as a high-end outbound music signal (HEL); each of the remotely separated means for producing music further comprising a second mixer circuit enabled for receiving a remotely produced sum/difference signal (SDR) and the mixer signal, a second high-pass filter receiving an output of the second mixer circuit, and enabled for producing a high-end, remotely produced output signal (HER) therefrom; and a summing circuit interconnected for summing the HER signal and a remotely produced low-end signal (LER) from the first phone line of the public telephone system with the MSL signal, and interconnected with a local output means for listening to the joint music production.