Hi I just bought a Digitech VX400 vocal stomp box and would appreciate any tips comments or advice on how to use it best for live vocal performances. I already have a TC Helicon M one XL that I have used live but it is a bit difficult changing settings in a live situation using this without a sound guy. So I bought this Digitech toy to make adding fx easy in a live setting. It is very similar to the VX300 but this model has a USB connection and some enhanced pre sets etc....plus it comes with Protracks software....it also has multi in and outs and a built in drum machine plus a host of other features.....I could not resist buying this as I spotted it second hand at a bargain price. It is like a guitar stomp box but specifically designed for vocalists.