Independently researched Practical Guide
Metal Detector Tones Explained
Detector tones encode ferrous classification, conductivity regions, signal strength or continuous pitch depending on the mode. Tone count changes information density—not detection depth.
Bottom line
Choose the simplest tone system that preserves the decisions you need
Two or five tones speed categorical decisions; All Tones exposes conductivity variation; proportional or pitch audio conveys strength/shape; threshold modes reveal subtle rises and nulls. Learn factory audio before changing breaks and frequencies.
Field guide
Starting points and hard limits
| Situation | Baseline | Action | Caution |
|---|---|---|---|
| Beginner coin park | 2 or 5 tones | Clear category decisions | Less conductivity nuance |
| Experienced mixed site | All Tones | Detailed ID variation | More audio fatigue |
| Relic/iron site | Proportional/pitch + iron audio | Shape and strength clues | Complex learning curve |
| Goldfield | Continuous pitch/threshold | Tiny changes and ground feedback | Trash becomes overwhelming |
Method
Use a controlled workflow
Identify the audio type
Bins, All Tones, proportional, pitch and threshold are different systems.
Learn factory breaks
Scan known targets and iron before moving boundaries.
Tune for hearing
Adjust pitch and volume so critical regions remain distinct.
Verify with motion
Cross-sweep and compare width, repeatability and iron edges.
Decision analysis
What actually changes the result
Tone bins are user-interface choices. Moving a tone break changes how accepted IDs sound, not the target’s underlying conductivity.
Iron volume does not equal iron rejection. Lowering ferrous volume can reduce fatigue while retaining evidence; turning iron off removes that context.
Audio response/gain can magnify weak sounds. It does not add raw detection depth and may make shallow and deep targets sound too similar.
FAQ
Seven questions specific to this page
Do more tones detect more targets?
No. They provide more audio categories or resolution, not extra electromagnetic depth.
What is All Tones?
A system mapping many or all accepted ID positions to progressively changing pitch.
What does proportional audio reveal?
Signal strength, width and target-edge information that fixed bell tones can hide.
Is Iron Volume the same as discrimination?
No. Iron Volume changes loudness; discrimination can silence the response.
Should tone breaks match online settings?
Only after testing regional targets and your hearing; factory breaks are the safer baseline.
What is pitch/VCO audio?
A continuous response whose pitch and often volume vary with signal strength, common in pinpoint and gold modes.
Can Audio Gain increase depth?
It makes weak accepted responses louder but does not create new detection capability.
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Use evidence, not copied numbers
Record the detector, mode, coil and conditions behind every useful result.
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