I play audio with TeamSpeak3 Client beta25.

so, audio player uses a sound device with WASAPI exlusive mode, then TeamSpeak3 Client can't catch all recoding devices including not working with exlusive mode.
The Playback device is used as exlusive mode, but recoding device is not used.

Another issue, after launching TeamSpeak3 Client, audio player can't use audio device with WASAPI exlusive mode.

I think the way TeamSpeak3 uses sound device is bad.

I use Windows 7 64bit edition and use two sound devices.