TC HeliconVoiceLive 3 - Miracles for voice. There are many ways you can use the unit, thanks to the wealth of connections on its rear panel, but your basic guitar/ mic setup sends vocals via an XLR output to a PA, and guitar signal from a jack output to your amp - the signals are kept separate, so you won't get vocal harmonies blaring through your guitar rig. The VoiceLive 3 operates using presets - there are 250 factory patches, with plenty more slots to store your own edits, but you can switch effects in and out within a preset. Two footswitches scroll up and down through the presets list, but you also get an extremely useful Step footswitch, which lets you step through different sounds in order - the idea being you can store different sounds within one preset for different song sections. Another set of six footswitches accesses the effects within a preset - five are assigned to single effects (default effects for guitar are modulation, delay, reverb, compressor and drive), while the sixth can be assigned to change several effects at once. On the singing front, the 11-block vocal effects path includes, among others, delay, reverb, harmony generation and a vocoder. Plug in a mic and sing through the unit, and you can do everything from adding subtle shading to your voice to completely transforming it - if you want to sound like a robot, here's your chance! The effects are high quality, and the harmonies track your voice really well - assuming you can sing in tune in the first place. Harmonies can be set to a fixed scale but - and here's the good bit - they can also be set to automatically change with your guitar chords. The classy-sounding guitar effects are derived from sister company TC Electronic's TonePrint pedals, and there's a complete pedalboard's worth that can be switched individually or collectively. You also get amp simulation in the signal chain, featuring a range of amps.