what kinda usb deck that can do.....
 

like adding reverb or echo to a track, speed up or slow down the entire song,,,,

how about ipod, can ipod do reverb and echo? i did not mean sound editing and save to different file and then play it,,
what i mean is reverb on, or off,

what kind of ipod app ?

is there any usb deck that does it ?
i remember pioneer deh-9400mp does it

No deck that I know of that does that. I can't think of any reason why you would need that feature.