For the phone you will need a USB OTG Cable, Micro-B Male connects to the phone the other end (USB Type A) female will require another USB Type A cable to plug into the USB Powered Hub you will have to get. The Hub connects to the DAC and usually comes with a Type A USB Cable. You will need RAC cables to go from the DAC to the Amp. Schiit recommends the below DAC, I got it and it works fine, I like the power switch,
http://www.amazon.com/Gear-Head-4-Port-Powered-UH5500ESP/dp/B004OBZ088/
You can find info on the below link from Schiit's website, which includes the whole story and links to getting all of the cables.
http://schiit.com/guides/getting-connected
By the way, the Note 3 (which I have) does not require any special software to play music files. The guide on the Schiit site recommends special software, USB Player Pro, you won't need this as any music player will work with the Note3.