Caustic Song file (optional):
This is not a highly technical, pro-type trick but it was fun and it just shows what can happen if you keep messing around with things until you break them. I found that running a padsynth through a static flanger and messing with the delay was giving me new harmonics that weren't in the original. Then I found that changing the delay changed the pitch of the harmonic sound. Then I figured why not use automation to record me playing these notes. The attached caustic file is a section from a song where I did this. If you want to see it in action, switch to the FX screen for the padsynth and play the track so that you can seen the knob move as the melody is played.
Like I said, nothing big or technical but a fun thing to mess with.
If you want to hear the full track its here: https://soundcloud.com/jhsound-2/0811a