Our VAS(VirtualAudioStreaming) works for your purpose, in fact, it is designed for this.
You can view the below article to see how to configure VAS to sing karaoke on website:
http://www.virtualaudiostreaming.net/stream-broadcast-sounds.htmlIn short:
1) open paltalk configuration dialog and set VAS as its input microphone. Something like below picture, I use Skype as example:
![Image](http://www.virtualaudiostreaming.net/images/Play-Sound-Files-To-Skype.jpg)
2) open VAS main dialog and select your real microphone like the below picture:
![Image](http://www.virtualaudiostreaming.net/images/VirtualAudioStreamingRecordSoundMic.jpg)
3) set VAS as the default system playback device:
![Image](http://www.virtualaudiostreaming.net/images/sound-recording-virtual-audio-streaming.png)
4) done.