GlennO
Axe-Master
I think that’s the closet we might get to a true doubling effect: multiple delays within a few milliseconds, crossfaded between them and which only change when muted, and a very short fixed delay on the other side. That way you can be ahead or behind, just like with real doubling. And if the delay times are stepping to new values while muted, you wouldn’t get the chorus sounding effect. Does that make sense? If so, it should not be so hard to do in the Axe, right?
If the crossfading occurs in the middle of a sustained note, it will be a noticeable artifact. Bakerman's AxeFX II preset did the crossfading only when a new note is triggered. Getting an envelope to trigger properly on guitar audio is difficult however. Even the Mimiq doesn't always do it properly. Also, true double tracked guitars sound just different enough that they avoid phasing. It's very difficult to avoid phasing when simulating double tracking.