1. Tonmind IPTool is a quick configuration tool for Tonmind IP Audio, which can be downloaded from website(Tonmind>Support>Download Center>Software).

2. Startup IPTool, search the IP speaker which is connected to your Internet.

3. Regarding RTP Multicast setting, press RTP Multicast, set the below two RTP Multicast no. (highlighted in below image) the same, select AUDIO MEDIA or AUDIO Source, then press Start.

4. You can also set the volume as you like.