Tuning question

[Top Jimmy]

I've been spending way to much time learning songs again and not enough time being creative. After a few sessions with my singer we realized that years ago we used to tune down a half step. This really helped him out, as far as saving his voice.

Now here is the problem, I know how to tune down a 1/2 step manualy, but my Korg CA-10 has calibrate button. It tunes from 430 -449 hz. So, If 440 hz is standard tuning, what would be a half step down?

Thanks

 

[Track Rat]

430

 

[Top Jimmy]

Thanks Man!