How to connect USB to Amplifier?

I have "InterM PAM-120 Public address Amplifier" I have 3.5mm jack connected to it so I Can play songs through my Ipod, Iphone… But I Was wondering if its possible to connect USB to play songs using USB?

You have to have DFC.

Not really - your USB memory stick does not have an audio output. The best you can do is connect the USB to a laptop or tablet and then connect it to the PA system.

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