Have been testing out the tones in prospecting mode on sports field, this seemed to be the best mode to use to find deep coins, it is not an easy mode to use in a trashy area though. The ground switch on the control box doesn't cancel the tones in this mode so ground balance can be updated and locked, but any button on the display does cancel the tones. Pulling on the trigger or pushing forward turned off the tones or can be used for pinpointing but the tones returned when trigger is centered. I found a low SAT speed threshold at 12' o'clock and sweeping slower with lower gain to listen for the threshold changes with slight tone worked best, too high a gain was worse. Sometimes there was no VID only threshold change with tone mixed in. The only way to use the tones was to start in Jewelry mode with tones and then switch to prospecting.