I've noticed that when I use a drop tuning on the Alt Tunings if I palm mute on strings higher than the low E it makes an odd warbling sound. I updated the firmware but that seems to make no change.
I have seen from other posts this could be a setup issue, but they were having problems with all the alt tunings. When I use a standard tuning so all the strings are dropped evenly it works fine, it's just drop tunings that act weird.
I have debated removing the non-Variax pickup as I never use it anyway (my rig is Shuriken Variax Sr270 into a Helix Floor), but I wanna check to see if I can fix this problem without.
I tune the guitar to D standard physically.