I have an F70...I have been running DP tones for 7yrs...I never leave them at all for any reason. Inland jewelry, dry beach sweeping, clad, occasional silver coins. Try this...1 disc, -3 thresh, 55 sens, DE mode...No notch..
You never have to look at the screen. You can tell audibly what is under the coil, the proportional audio tells you how deep it is...its a very fast way to hunt, so its primary advantage to me is speed. You can tell a Q from a half, a zinc from a copper P, all that...with really good phones, you can get to tell a N from a tab based upon its target profile and ping solidity...
This allows you to fly through a lot of trash and pick coins out in a hurry..Its comfortable and relaxing actually, hearing it all allows you to find the zones...I've got over 20 dirt gold rings and one big gold chain using this...had a 10k coin year back in 2012 just local park hunting...heavy trash, you dont have to dig it if you dont want to...
If your sens is too hot, the subtleties of the target shape and profile and depth are too wide to rapidly determine, so the lower the sens combined with a neg thresh gives some very accurate audio feedback...
These settings I gave you are good on targets in the top 5"...deeper depending on soil moisture conditions etc...so adjust accordingly if you are after deeper targets...