The Virus TI is not only a synthesizer; it is a full-fledged multi-effect processor with analog and digital inputs. Listen to the following examples which feature real bass, guitar and drums played through the Virus' FX engine. Of course the entire synthesizer engine works in parallel so you could play synth parts simultaneously.
Every virus patch allows you to connect your favorite sound shaping functions individually to three onboard assignable knobs. You can name these mappings appropriately and even assign multiple parameters to one knob for multi-axis real-time sound morphing.