Just got a used Ashdown Rootmaster 220. So far, great sounding head through my Aguilar GS112. My question is do I use the one button or two button foot switch? It has that 'octaves' feature (which I really like) as well as a Drive feature as well. I'm thinking that a two button will toggle each separately? But it has 'aux in & out' 1/4" TRS connection as well, so maybe that will be one of the switchable functions? Nowhere I can find any info on this, but I know all y'all TB'ers will come through! Thanks in advance.