A dynamic effect that rapidly lowers and raises the volume of your guitar tone creating a wobbly pulsing quality. This effect was found initially in valve amplifiers but soon found its way into compact pedals for more control over the wave shape of modulation (smooth sine-waves vs choppy square-wave), depth and ranges of rate.
Demo by ProGuitarShopDemos (EN)
Official Product Video (EN)
Demo by Jack Fossett (EN)
Demo by The Tone King (EN)