Running my Ace in my favorite mode-Relics. Got down in my competition mode with the coil flashing at somewhat faster than usual speeds-and since I pinpoint in motion I was flyin'. Had five tot lots in area schools to hit before work. Found over $6 in coins and got the "boop" sound for very small foil, etc. but this time it was wider and when I slowed down and rechecked it, it changed to the standard tone. Didn't see any markings anywhere, so I'll have to have it checked-probably not real gold. Here's my take on those who have quirks with the Ace: I have used other tone detectors and sometimes tiny pieces of metal will cause a high tone, but will change when the coil is centered and slowed down on the target. Likewise on the Ace. Here's the problem-the Ace doesn't have a quick high tone-it has the dreaded "bong" and those not understanding the way detectors react to these "iffy" targets have to listen to a loud "bong" instead of a quick high tone-THAT IS the Ace's high tone! So when you learn to slow down or raise the coil or center it on the target, you realize that the Ace is doing what other detectors do-just noisier.