howto selfoscillating sound and octave switch

[Roby31]

Are you using saturation? also, not all filters behave the same way: I think it's very possible that Access made their AE filter produce some more harmonics than an ideal self-oscillation would. It sounds similar to a triangle wave to me - I'd never checked with a scope, tough...and since I prefer the sweetness of the tri to the sound of a sine I also find it quite enjoyable