Play music in a Skype call

I found a way to do this with Virtual Audio Cable and 1 Skype open.

1. Open VAC Control Panel and make 2 lines
2. Open 4 Audio Repeater(MME)s
3. Set the First to Wave In: Line 1 and Wave Out: Speakers or primary output device
4. Set the Second to Wave In: Primary Microphone and Wave Out: Line 1
5. Set the Third to Wave In: Primary Microhone and Wave Out: Line 2
6. Set the Fourth to Wave In: Line 1 and Wave Out: Line 2

Once this is done set Line 1 as your default playback device in Windows and as Line 2 as your default recording device .

Make sure when you change your Skype settings to also have Line 2 as your microphone and your primary output device as the speakers.

This will make it so both you and your caller can hear any audio that comes from your computer (youtube, spotify, pandora, etc.). You can still talk and you won't hear yourself in an echo and neither will the party on the skype call.

I'm using this solution from a long time ago, though is even more difficult, but you don't need to have two skypes running at once.

Create two lines with VirtualAudioCable.

Configure the playing program to output to Line1.

Using VAC repeater copy Line1 to speaker.

With other instance of VAC repeater copy Line1 to Line2.

With other instance of VAC repeater copy your Mic to Line2.

Configure Skype to input from Line2 and Output to Speaker.

If you don't need to listen to the music, and just let the other person to listen to it, you just need one line, as Darwin said. And set Skype input as line1. If you want the other person to listen to you and to the music just use VAC repeater to copy microphone to line1.