When you listen to music in stereo, not everything that you hear from the left speaker is identical to what you hear from the right. This is usually unnoticed by the average listener and is a result of efficient mixing and mastering. The process of panning one channel to the left or right gives an instrument some space, thus making the sounds clearer.
There are also plugins that you can use to split a stereo signal into separate mid and side channels. The mid channel should contain the sounds that are identical in both the left and right speakers, while the side channel should contain everything that is different. You will then be able to adjust these channels with greater precision.
is an audio plugin that can encode (split) a stereo signal into two separate mid and side channels, but also decode the two channels back into one stereo signal. The interface offers you minimalistic control, with two gain knobs and two pan knobs assigned for each channel. MSED also helps you visualize the signal better with a stereo correlation meter (named “Correlometer”), a right/left balance meter and a “plasma” vector scope.
The plugin also features a few presets and many customizable color themes..