Good Imitation of the Blues Slide Tuning?

Hi all

Does anyone here know the slide tuning used on Alan Jackson's Good Imitation of the Blues from the Like Red on a Rose album?

Thanks in advance for any help!

Pete

I believe it's in Standard, that's how I play it

Sargeslide

I can't believe I didn't even try standard! I tried open D, Open G, all sorts of crosstunes but not standard!

Thanks for that.