Use mid-side delay for added depth

0.1-0.3ms of delay on the mid channel makes enough of a different. 0.02ms makes hardly any difference when listening in stereo, but helps with binaural translation.1

Phase shifting on the mid channel does a similar kind of thing, like the phi function does in SlickEQ GE.1 I’d like to try this with Volcano 3 too.2

For yet another flavor, using an all-pass filter to rotate the phase on the mid channel.1

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