Apparatus and method for music production by at least two remotely located music sources

A method for joint music production comprising the steps of:

• joining a remotely separated pair of means for producing music 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;
• and within both of the remotely separated means for producing music:
• producing a locally produced first music signal (MSL) with full audio range;
• impressing the MSL signal on the first phone line of the public telephone system to create a locally produced low-end outbound music signal (LEL);
• filtering the MSL signal separately, with a first high-pass filter;
• mixing an output of the first high-pass filter with a mixer signal, thereby producing a locally produced sum/difference signal (SDL);
• impressing the SDL signal onto the second phone line of the public telephone system as a high-end outbound music signal (HEL);
• and further within both of the remotely separated means for producing music;
• enabling a second mixer circuit for receiving a remotely produced sum/difference signal (SDR) and the mixer signal, receiving an output of the second mixer circuit at a second high-pass filter, thereby producing a high-end, remotely produced output signal (HER);
• 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 for listening to the joint music production.

A method for joint music production comprising the steps of:

• joining a remotely separated plurality of means for producing music by at least 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;
• and within each of the remotely separated means for producing music:
• producing a locally produced first music signal (MSL) with full audio range;
• impressing the MSL signal on at least the first phone line of the public telephone system to create at least one locally produced low-end outbound music signal (LEL);
• filtering the MSL signal separately, with a first high-pass filter;
• mixing an output of the first high-pass filter with a mixer signal, thereby producing a locally produced sum/difference signal (SDL);
• impressing the SDL signal onto at least the second phone line of the public telephone system as a high-end outbound music signal (HEL);
• and further within each of the remotely separated means for producing music;
• enabling a second mixer circuit for receiving at least one remotely produced sum/difference signal (SDR) and the mixer signal, receiving an output of the second mixer circuit at a second high-pass filter, thereby producing a high-end, remotely produced output signal (HER);
• summing the HER signal and at least one remotely produced low-end signal (LER) with the MSL signal for listening to the joint music production.