two tone audio would work for me too!
7 tones involves more audio fatigue, still doable though.
i don't need g.p.r.o. admit "may" be useful in certain situations,
most of the time not needed. as a "coin and jewelry" "hound" it is "fantastic"
with that 6 eclipse on board. whitey "dumped" it in favor of the excellent mx-5 after being in the line for more than 10 years.the mx-5 'croaked" in sales, so they brought it back!.a hell of a lot of people love that detector, and it's been able to survive in the shadow of the mxt all these years. tons have been found with the m6, testament to it's excellent design.terrific detector for coins and jewelry, a true "sleeper"

(h.h.!)
j.t.