Detune

If you have two oscillators tuned to exactly the same frequency – and I mean, exactly the same frequency – there’s not much point in having more than one oscillator. However, when you change the tuning of one ever so slightly – in other words, detune it – you will start to hear interesting interactions between the two, often referred to as chorusing or beating. The result tends to be more interesting and “full” – and a bit more natural, as two singers or instruments can rarely hit exactly the same note.