Hey everyone! I was listening to the wonderful Ys album from 1972 italian prog legends Balletto di Bronzo. I couldn't stop wondering what a certain effect is that comes up a few times throughout the album (on the guitar). I think it would create wonders on the bass as well. The closest thing i've seen in videos to *maybe* replicate it is the IE Polytope after some heavy dirt. Just wondering if any more knowledgeable TBers could help me determine what modulation exactly the guy is using. it's on all the 1's from 0:09 to 0:25 Thanks!