Metal Detector

A method for detecting a target using a metal detector by producing at least two different modulated audio tones, by modulating a first audio tone with a first stereo audio modulator signal and modulating a second audio tone with a second stereo audio modulator signal; and applying at least the first audio tone to a left side of an audio stereo target indicator indicative of the target, and applying at least the second audio tone to a right side of the audio stereo target indicator. The modulating of the first audio tone and modulating of the second audio tone, includes one or more of the following; a modulation of a volume of a tone, a modulation of a pitch of a tone, a modulation of relative harmonics ratios of a tone, a modulation of a chord richness of a tone.