Fiio S15 Setup

I need help setting up my Fiio S15 music streamer with my home entertainment system. Currently, nothing seems to work.

My setup includes:
- TV
- AV Receiver
- Speakers
- Turntable
- Bulk hard drive storage for CDs

The Fiio S15 supports Bluetooth and WiFi connections. My AV Receiver has HDMI, Optical/Coaxial Audio, and RCA input connections.

Ideal skills & experience:
- Experience with Fiio products
- Familiarity with home entertainment system integration
- Knowledge of Bluetooth/WiFi streaming setup

Please ensure everything is configured correctly and is fully functional.