Stereo Image Munger For Mac

People are used to thinking of stereo in term of a left and a right channel, but it's also possible to represent it as a sum and a difference channel, or what audio engineers call the M (mono) and S (stereo) channels.  (For you mathematicians, this is just a change of basis in the vector space of stereo.)

It is sometimes desirable to adjust the levels of M and S independently, or even to apply separate processing to these channels.  Stereo Image Munger is a small Swiss army knife for this sort of processing.

There are three typical ways of using it: · Adjust the L/R gains to pan the audio, and the M/S gains to adjust the stereo image.  (Increasing S, for example, will widen the image.) · Output pairs like L/L or M/M to hear each channel by itself. · Create a chain that looks like this: Stereo Image Munger 1 -> (filter) ->  Stereo Image Munger 2. Set SIM 1 to translate L/R to M/S.  Apply filtering in M/S space — EQ on just the S channel, for example. Then set SIM 2 to translate M/S back to L/R.     You can also create novel (if not entirely useful) effects by outputting odd combinations such as L/S, or by outputting M/S and leaving it there in the mix. Experiment and enjoy.