The tone adjustment doesn't really seem to make that much of a difference in target tones to my ears , threshold tone does change things up a bit however. It's nothing like on the etrac/CTX where you could actually over modulate targets on the extreme adjustments. Certain threshold tone adjustments on those machines made certain targets(nickels in particular) very unique and distinct. I have not found a similar result with the Legend but , like the etrac/CTX , I also found absolutely no need for a 100 point VDI . If a target sounds wholesome the difference of a VDI of 38 vs 40 is not going to chase me away from digging it.
I use a penny, Nickel, Dime and quarter to set the pitches by, I set up a 6 tone program nickels come in at 24-26 so that bin is set at 13 on the pitch, pennies come in at 43 and dimes at 45-46 I set that bin at 21 on the pitch, Quarters ring up at 50-51 usually but I have dug a couple of Quarters that was bouncing 48-51 again most of the time at 50-51 so I set the pitch at 30, Eisenhower $1 coins ring up a solid 55 so they fall in the same bin as a quarter in my settings the way I have the pitches set for my 6 tone setting you can very clearly tell the difference between clad coins it gives you a very distinctive LOW,Medium and High tone for each coin.
my tone breaks are set at 7,16,27,37,and 46 47-60 is the 6th bin
Bin 1- 1-7 volume 4, pitch 3
Bin 2- 8-16 volume 10, pitch 5
Bin 3- Nickel Bin 17-27 volume 10, pitch 13 (Nice Low Tone) have found a couple of 10K rings in this bin range also
Bin 4- Scrap range 28-37 volume 10, pitch 5
Bin 5- Pennie and Dime range 38-46 volume at 10, pitch 21
Bin 6- Quarters and Eisenhower $1 coins volume 10, pitch 30 this bin is screaming Dig Me
As you can see by setting the pitches where I have them set it gives me a very distinctive, Low, Mid and High tone for U.S clad coins, I also use this in A (All Metal) Mode
I do not use the threshold in Park,Field, or Beach mode because that threshold in those three modes to me is a pointless threshold and it only works if you have discriminated TIDs out and even then all that threshold in those three modes does is to alert you that you have just swung over a discriminated target, why discriminate anything if you want to know you have just swung over something.