misfit45

Hi, I am new to the forum and I wondered if one of you fine Line 6 players would be able to help me out. I am looking to get a 12 string sound using the Spider IV 150w. I have got quite a nice sound using the Pitch Glide, which is fine when playing single notes, but when I strum a chord (or say... Stairway to Heaven) the pitch goes way off. Is there any way of changing any settings to just get a straight note with an octave. Any help would be much appreciated. Thanks in advance. Misfit