Hey, Neo! Just to make sure I'm following you, the noise is only an issue when using the TF while playing leads, right? I'm still thinking it's a level problem… the decimator's taking out the noise when you're not playing and when the TF's on and you're playing enough to cover the noise up, but not when you're playing sparse leads with the TF on. At least that's what I think is going on… it'll help to know what your exact settings are.