Harold, The manual says dimes and copper pennies are 28 - 30, quarters are 30 - 34, Zinc pennies are 20 - 22. (IH pennies are not in the manual but I get 19 - 21).
I was wrong about the volume set-up. Volume goes to #9 setting, I was using #4. I just did an air test, going to a higher volume number increases the siganal volume for shallow coins, deeper coins still sound deep even at setting #9. I might have been thinking of the volume settings on my CZ. I confirmed the audio modulation on the Edge with an air test a few minutes ago. I had the Edge for a year now, but rarely ever used it, being a Tesoro lover. Seems the Edge is equal to my Cortes in many ways, including depth. I will hang up the Cortes for a while and see if I like the Edge better. So far I like that it has 4 tones, the Cortes has 9 tones but I have to press the SUM switch to get the tones and thats not good when there is a lot of targets close to each other, so I look at the Cortes meter a lot.