Hz help on ACOUSTIC guitar?

Question

my guitar is tuned to 440 Hz right now. But some other songs are not tuned to that standard A. How do I find out what the Hz is to a particular song if it is not 440 Hz? (other than playing w/ the tuner till I get the right one)

Answer 1

>>But some other songs are not tuned to that standard A.<<

Are you sure you know what you're talking about?  Honestly I don't think what you're saying is true.  There are lots of songs that are played in alternate tuning but that doesn't mean that A is changed to something other than 440 Hz.

Can you give an example of a song that uses something other than    A = 440 Hz?  I've never heard of one.  Thanks.