the auto drop d button that some guitars (dean flying v) have....what exacally does it do and how does it work.....
It automatically drops the low e string from E to D, how it works I cannot tell you.
Basically it's a Hipshot D-Tuner that Bassists have used for years :P
Charvel/Jackson 3B Bass
Jackson CMG Bass
Ibanez BTB575FM 5-String Bass
Vintage 70s Ampeg V9 SVT/ Ampeg 8x10 Cab
Fender Deluxe Blackout Telecaster

Angelus Mortem
Or for guitars

EVH D-Tuna.

It basically just detunes your last string. If you go for it, it's a one way ticket, you might not like it,