Another option is to go the other way....
Set it to 'All Metal Mode'.
Turn down the sensitivity to say 5 or 6 bars.
Ground balance it.
Give it a swing.
This should eliminate a lot of the crackles, pops, and grunts caused by the discrimination when in 'Disc2' mode.
But now, it will sound off on everything. Meaning you may need to pay attention to the ID Numbers a bit more, at least until you get more used to the sounds.
Then again, there are the more 'advanced' features;
Threshold settings
Ground Balance Window settings.
Iron discrimination settings
etc.
Some like the discrimination mode better, some like the 'all metal mode' better. Try them both and see which works better for you.
It WILL take some time and using it for a bit to REALLY get the feel of it. Especially if you are coming from using an AT Pro.
But is is a very good machine. Just a bit more high-end and sensitive when compared to an AT Pro.
I think the AT Gold is a bit better for Jewelry, Gold, Silver, Relics. But still good on Coins too.
I think the AT Pro is better for Coins, New Users, and people who prefer a quieter machine, but it too is still very good for Jewelry, Gold Silver, Relics, etc.