You can switch the input source on your STEALTH 7.1 DSP to "WiFi", now the amplifier is visible as a playback device in your smartphone. Currently ONLY Apple iPhone users (iPhone 5 and higher) can use the full streaming function. Android smartphone users can only play locally stored content via WiFi streaming. Google refuses the simultaneous use of the mobile data network for applications like Spotify / Tidal or similar and the simultaneous streaming function via WiFi. We therefore recommend using the app "Bubble UpNP". Apple users can easily simply put the audio output via Apple AirPlay on the STEALTH 7.1 DSP, please note the function described in the user manual.