How did he do this snare effect

Just sounds like a snare rush with an LP filter and jumping up and down an octave to me. Nice tune!

Right… Renoise has the Retrigger and Slide pitch up/down commands which might be usefull to do this

snare retrigger.xrns (24.1 KB)

repeater won’t “obey” the pitch slides, better to use phrases

Benn’s active on twitter, you might get an answer if you asked him!