Sorry I didnt get back. It is in the tones in the foil area the low tone is very smooth as where foil and tabs have a slightly scratchy sound, I pretty much didnt look at numbers because the sound is where the ID is made. When the tone in some gold is near the penny and silver range for numbers the tone is a smooth high low tone. I pretty much talk in terms of tone over numbers, and I overlap my swings by 1/3 of a coil, for a DD coil that covers an area quite well. When running the Tone Variability at 30 the tones are very subtle and distinctive. I hate TTF myself it makes you use the screen far too much and I hardly look at mine till I get good hits. Also using the Long tone Response makes a difference in target ID and falsing. If you are in an iron infested are guess what? You have to slow down a lot for the processor to see through, you can tell the right speed by your Sensitivity numbers, because and iron infested are will drop the numbers untill you slow down enough. Also you may have to run at -3 or the suggested instead of +3. You always let the conditions determine how you search an area.