Sub Phatty oscillator 2

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Oscillator 2 on my sub phatty has gone hay wire, it produces very high pitched noises and it sounds like white noise, it started doing it all of a sudden when i was playing it started going out of tune then and then stopped producing any low frequencies. This happened as I was just playing the keys. I have tried turning the resonance right down and changing the wave form and opening and closing the filter.