Teufel does not offer a special software/app for Windows or Apple computers to control Teufel Streaming.
To play music from your PC via your streaming speakers, you have two options.
Option 1:
Simply connect the sound output of the computer/laptop to the line-in of your Teufel Streaming device (typically via 3.5 mm jack cable). All sound signals are now output directly to the speaker, e.g., when playing YouTube videos or streaming services such as Spotify, TIDAL, Deezer, etc.
IMPORTANT: Do not use the "Line In" streaming via the app, but activate the Line In channel by pressing the square icon on the device itself. This way there will be no delay in the signals.
Option 2:
Alternatively, you have the option of integrating your computer into the Teufel Streaming System via your WiFi network. This way, you can set up music stored your computer as a library for Teufel Streaming and then play it via the App.
To do this, go to the settings in the Teufel Streaming app, then to the menu item "My music" Library" and then to "Add resources...". Here you can include your Windows PC as a media server or as a network drive (prerequisite: the network share of the corresponding drive must be available on the PC).
After the setup, you can play the music stored on your computer via the streaming speakers using the app.