A:AnswerIt's for transferring tracks to a computer as digital files. You'll need software on the computer to do this.
Audacity is free and works well. This is covered in the manual.
A:AnswerCheck the switches in the back on the unit. If they are configured correctly, I would recommend you talk with Sony.
I had the same issue when I set mine up and tried connecting to wireless and wired speakers (after I could not get the wireless speakers to work) when I bought this product. After troubleshooting with Sony (via their online chat function), we determined I had a defective product and I exchanged it for a different one at Best Buy—same model.
A:AnswerI had the same issue when I purchased this. I chatted with Sony via their on line chat function to troubleshoot and we determined I had a defective unit. I exchanged the unit at Best Buy and the new one has worked great since the setup.