Good afternoon. I have recently bought a Red Witch Violet Analog Delay. After I played a little with it, I found that when engaged, it distorts the sound of my bass, both the original signal and the repetitions. This case gets even worse when I change my bass' pickups from single coil to humbuckers (it is loaded with EMG TW pickups), or when I play in the lower register of the instrument. I even tried it without any other pedals, using new cables and with my old bass which is passive (my other bass is active). What could be the problem?