Years ago I had an app that allowed you to widen the base a.k.a. width and thus depth perception of sound played.
I no longer have this app, neither do I recall its name.

This app allowed you to widen the base between the left and right channels as if the speakers were instead of 3 feet, i.e. 15 feet apart.
The result was a much "larger" and "deeper" and voluminous more dimensional sound.
Does anyone know of such an audio enhancing app?

Many thanks in advance!