P-10 includes a simple mixer for combining and adjusting pre-filter oscillator and noise levels.
Osc A- Sets the level of Oscillator A.
Osc B- Sets the level of Oscillator B.
Noise- Sets the level of white noise. If you're not familiar with white noise, technically speaking, it's a random signal in which all frequencies across the frequency spectrum are represented equally. In use, it's a "hiss" sound that's useful for non-pitched percussive sounds, wind, explosions, etc.