F# below the double G folks. For you non trumpeters this probably doesn't mean much, it may even look a bit like a foreign language...but for those of you who can appreciate my range expansion WHOO HOO!! Interestingly, I have not recently been focused on my range. Just wrong the flexibilities in my warm up as a matter of routine, picked up the horn today, and it sort of slipped out. Best. Surprise. Ever.