Most recently, yes. I’ve tried this experiment using the sample player, pitch shifting delay, and manual grains.
So far nothing has been perfect - each method has some trade offs in the form of either artifacts of some sort, or lag behind any adjustments or modulations to the source oscillator.
I should probably mention [just in case it’s not obvious] that I’m not necessarily expecting any of this to work. I realize I’m off in left field here, seeing what I can coerce the ER-301 to do.