Hi I had a question about the wailer wah. I just recently purchased it and I love the sound but it adds white noise/hiss to the pedal chain when bypassed and also turned on. The weird thing is that it only does this when placed before overdrive/dirt boxes but when placed after dirt boxes no added noise when bypassed or turned on. I was just wondering if this is normal for this pedal or not. Im not daisy chaining any effects, they are all on an isolated power supply. I also tried before and after dirt with just one dirt pedal and the wah with individual plug in power supplies, one for each straight into the amp. No noise with wah after dirt but with it before dirt a lot of noise bypassed and the effect engaged. And finally I tried it with just the 9 Volt battery supplied and still got the same results. I prefer the wah before dirt sound but it just adds a lot of extra noise and just wanted to know if this is normal. Thanks in advance.