It helps to ID a minnie 173. A half, quarter, dime, or bronze penny (or a can) 180... other than that, if you get good sounding audio you better dig. I like the meter because the SovGT is so stable on the TID that a good target, a deep one sat 8 to 10 inches, if it is a ring or coin will usually give the same number from 4 directions. I've tested it before on some targets like that against the T2, F75, Explorer, E-TRAC, and Tejon... and found it to bethe only one (that day/that site/those targets) to give a good TID. A white gold circlet with small diamonds, some odd silver piece, three wheaties... 2-1917 and 1-1918... I was hunting a place where I knew there had to be something and I couldn't find any good signals... it wasn't a setup test it was just that the GT was the last machine I tried and BAM... in a few minutes I had a handfull of good targets. The gold came in really low, around 100+/- I don't remember exactly but I do remember that the TID was steady and did not jump or change from different directions... in that case the meter made a difference because it didn't change even one number. Maybe audio would have given me the same conclusion but the meter made it easy and fast. It also helps if you are in a site infested with a certain pulltab because unless they are bent or broken they will read the same everytime. I suppose after some time one could learnthe audio well enough but in someone's yard it is good to have a little help as long as you don't let it persuade you to leave good targets in the ground. Too much target info will tend to convince people to pass on recovering a target many times... I have done it but I have learned "when in doubt... dig" I have started digging a lot more tabs and especially shallow junk targets at older sites... because, the easy silver and the easy relics are gone. What is left is either masked or stuff that is hiding in plain sight... shallow, reading like junk and still there because no one will dig it. Two of my best finds came that way... but I have gotten off topic unless to say that to rely on the TID too much is going to work against you. Use it to verify a 180, to avoid a common tab that is infesting a particular area, or to see if the number changes a few digits when you hit it from the side (it may still be a good target colocated with iron though).
The meter is a helper but not a crutch. If you rely on it too much you will leave too much in the ground... IMO.
J
J