@DaftFader 557439 wrote:

A slightly different type of movement you could do is to assign a sine wave oscillator to the pitch of you main oscillators and again only having it slighly effect the sound and only moving the pitch slightly. This will give a vibrating movement, kinda like when you hear a resonating bass that seams to wobble (not so mcuh as a dubstep kinda wobble) but it will very subtly add an extra vibration to what would otherwise be a flat tone.

A device known as a wobbulator was used to test and set up analogue radio receivers for most of the 20th century, but could also be used to make such noises and many radio engineers were also into early electronic music. The BBC used them a lot for the sounds on Dr Who and other similar shows..

Wobbulator