Shnorr signatures

[CarltonWyatt]

Sorry just a quick one, I can't remember why I have it in my head that schnorr signatures use a Merkel tree approach to signatures. I just can't remember where I found the lecture on it and I can't find any reference to Merkel trees in schnorr signatures?

[Xynerise]

Was it in Sipa's talk in Scaling Bitcoin in Milan?

A transcript of the video above (Pieter's part) can be found here

Or this Blockstream post?