I got a brand new LT today, updated to 2.30....after 5 minutes I scrolled the Presets.......and with a high pitched peeeww, the sound was gone, and instead, I heard a constant de de de de de de, not connected to the volume knob.......That was my intro to the Helix LT......10 minutes of pleasure and now I have to bring it back......grrrrr...