1) The high audio sound given off on this unit is NOT the belltone sound which is common on other Garrett units.
2) The advanced audio system allows the user to distinguish the difference between junk targets that would read up in the coin range and good targets. Example: In a "Standard Mode", You can go over a US quarter and then a flattened, rusty bottlecap and they will produce the same high tone. Switch to a "Pro Mode" and the bottle cap will sound slightly different than the quarter. Turn on the "Iron Audio" feature and the bottle cap produces a low-high-low (multi-tone), and the quarter will still produce only the high tone. That makes it very easy to separate junk targets from coins. The illustrations that are in the catalog pages that have been posted on the forums and on the Garrett website explain this audio feature.
Did somebody say DD's like bottlecaps?
It is "Tone Roll Audio" on this page - http://garrett.com/at_pro/page5.htm
2) The advanced audio system allows the user to distinguish the difference between junk targets that would read up in the coin range and good targets. Example: In a "Standard Mode", You can go over a US quarter and then a flattened, rusty bottlecap and they will produce the same high tone. Switch to a "Pro Mode" and the bottle cap will sound slightly different than the quarter. Turn on the "Iron Audio" feature and the bottle cap produces a low-high-low (multi-tone), and the quarter will still produce only the high tone. That makes it very easy to separate junk targets from coins. The illustrations that are in the catalog pages that have been posted on the forums and on the Garrett website explain this audio feature.
Did somebody say DD's like bottlecaps?
It is "Tone Roll Audio" on this page - http://garrett.com/at_pro/page5.htm