It is mainly in ES2 when I am building sub bass, every time I strike a key to cut off the previous note an begin another I get a pop in between, when I mentioned ASDR I was referring to the attack adjustment but it is obviously a software issue because that makes no difference. I can have the attack way up where the synth is silent for a second after striking a key and I still get that nasty pop. I need mono enabled but I apologize, it happens in poly and legato as well, also happens in sculpture with really any sound I make. I often spend hours modifying and damaging my pieces trying to eliminate these pops hands on.