# Differential Balancing Process A [[Sound balancing]] technique that eliminates noise from a signal. It requires the receiving device to be compatible. Clean sound - ![[signal wave.png]] - Imbalance caused by the cables capturing noise - ![[signal hits wave.png]] - Sound like a glitch in the recording - On an unbalanced connection like an XLR > Mini jack cable, we can't avoid that - With sound balancing, the same signal is sent to two identical wires, the one is the mirror image of the original (i.e., turned upside down) - ![[signal audio processing.png]] - This happens in the microphone, *before* the signal is sent down the cable - ![[signal wave buzz.png]] - At the other end of the cable, the device receiving the signal will flip the signal of the mirror image again, restoring it to its original version - ![[audio signal wave cut.png]] - The signal on both sides matches, but the glitch is upside down - When both signals are added together, it gives a big and strong signal for the sound you care about. And the glitch is cancelled because of its negative version