Motorboating on double notes

[Yazoo]

I'm playing through a rack preamp and power amp going into a speaker simulator, either the Marshall speaker simulator or the Celestion V30 simulator, and on the whole it sounds good. What I do get though is what I think is referred to as motorboating when I do a double string bend - holding a string on the top E and bending the B string up to the same note for example. Is this just a limitation of the speaker simulator or is there some way round this?

Has anybody else experienced the same effect/problem?

[jacobyjd]

that sounds like the natural effect that happens at your ears when notes close to each other are played...the bending allows the modulations to become more evident. You'd hear the same thing, albeit more mildly, with an acoustic guitar.

My guess is that whatever tone you're achieving is simply making it more evident...any sort of distortion tends to bring it out

Unless I'm completely wrong, which is possible.

[MarcoMike]

Well, I think that's the correct explanation... and that's a pretty cool effect (one of my favourite tricks)!!! I noticed it's much more evident on distorted/sustained sounds, playing through a big muff lets you create some really effective speed modulable tremolo sounds...

[slacker]

That's what it sounds like to me, you're just hearing the "beating" caused by 2 similar frequencies being mixed together.

I supposed the simulators might be exaggerating the effect  but I've never used them so I don't know.

. and that's a pretty cool effect (one of my favourite tricks)!!!

Mine too, probably my favourite player, Joey Santiago of the Pixies used it to great effect.