controller to computer to amp?

[soundpiano]

I have a midi controller which i am using with my computer via midi/usb cable. How do i go from my computer to an amp? My midi cable has midi in/out which both connect to the usb.

do i have to use the headphone jack to go to an amp?

 

[goz211]

Maybe. Stick up some specs - is there a soundcard in your computer?