Ipod and usb channel

Hi everybody at Bose
I need some urgent help because i need to free the 4/5 channel to connect my Boss GT 10 and the 1,2,3 channels are already taken with two microphones and acoustic guitar. So i wonder if I could connect my Ipod with the backing tracks to the USB port and how could i control the volume. Hope anybody could help me out with this. Thanks a lot guys.
Note: I have the Ipod and the Boss gt 10 connected to a small mixer which is connected to the 4/5 channel but I would like to use it only with the gt 10.

Hello twinflames,

You can only use the usb port to connect the T1 to a computer. it would not interface properly with another peripheral such as an ipod. The best way to connect your ipod would be through ch4/5, or via your small mixer.

Thanks for posting,