A different kind of retrograde.

A second canon on the row from Webern's Symphony Op. 21.

For this one, I made an unusual kind of retrograde canon.

I made the upper part from O and I and the lower from RI and R. All this seems to create the the retrograde in the lower part. However, the retrograde in time points ends up being quite a different thing. Here the retrograde is 4 measures lone, for instance. (I repeated the first for bars of the upper part...)

So, even though I used the exact numerical retrograde, I have an entirely different type of musical retrograde.

(click on image to enlarge)