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=== Stereo Mono Conversion ====== Theory of Stereo Mono Conversion ===The signal is invariably on the tip of the plug, and the metallic sleeve closest to the body of the plug is the shield/ground.=== Mono Jack wiring ===Common on musical instruments, stomp boxes and unbalanced microphones* Tip - signal (Hot)* Ring - Ground=== Stereo Jack Connections ===The contacts of a stereo plug are allocated as follows* Tip - Left channel* Ring - Right channel* Sleeve - Common (ground)=== Balanced Audio Tip-Ring-Sleeve (TRS) Jack Plug Connections ===Often implemented with the professional TRS jack* Tip - Hot (+)* Ring - Cold (-)* Sleeve - Ground=== PC99 computer Audio connections (3.5mm 3 pole jack) ===As used on PC sound card microphone inputs (outputs and line inputs follow the regular stereo jack connections above). 3.5mm connectors are used.* Tip - Mic input* Ring - +5V supply, (via a limiting resistor usually)* Sleeve - Ground