Keep the messenger settings the same, but in Audacity, you need to change PlayBack Device to preference to Line 1 (Virtual Audio Cable). This method is useful if you want to record your friend’s speech. Stream What Your Friend Is Saying to a Virtual Speaker and Record It Using Audacity Since this is virtual and not a physical mic, it will be noise-free. When you play a music from Windows Media Player, it is streamed out using Line 1 Audio and captured by Mic 1 Audio to the messenger. In Microphone, select Mic 1 (Virtual Audio Cable).Now Launch Yahoo Messenger and Go to Preferences > Video and Voice.Change the speaker choice to Line 1 (Virtual Audio Cable).Press Alt and Go to Tools > Options >Devices > Speakers Play Music on Your Windows Media Player and Stream It to Messenger You need to figure out to configure speaker and microphone settings for those apps. It works almost the same way for any other software. Here is an example using Windows Media Player and Yahoo messenger. Leave the rest of the settings to default.Check the box which says mic under-connected Source Lines. By default, it will create one cable for you.Then launch the Control Panel of the application.Download it from here and Install it with admin privilege.
The problem here is that the sound quality is not right and will also carry external noise. The only option is to turn on your mic and play the music loud so they can listen. For example, if your friends want to listen to music over messenger or Skype. Sometimes you require to use the audio of one program to be used by another application.