Could you give some details about how you are hooking things up? It sounds like you are trying to hook the tonearm wire directly to the input of the Xitel or iMic, which wouldn't work as you need a preamp with a phono section for gain and RIAA equalization.
NAD and Pro-ject make boxes with USB ports that combine phono preamp and ADC (Analog to Digital Converter). However, with the equipment you have, you only need a pre-amp or receiver with a phono section.
NAD and Pro-ject make boxes with USB ports that combine phono preamp and ADC (Analog to Digital Converter). However, with the equipment you have, you only need a pre-amp or receiver with a phono section.