Software that plays music through Microphone?

Me and some friends are gonna play Space Engineers competitively against one another and when I find one of their bases I want to play the "The Imperial Theme" when I locate and start attacking them.
Hilarity will ensue.

But I need a program that plays music over the microphone when I hit a key. I would like it if I could attach different songs to multiple keys.

Gives me a use for all these programmable buttons.

With 'playing through microphone' you actually mean that  your buddys in TS or something can hear your voice and your music if you trigger them right? 

Otherwise I would warn you to misuse your microphon as speaker (which can be possible) :D

My only solution would be a combination of a recordingprogram with the ability to trigger samples via midi, a midi keyboard (fancy!) and asio->wdm in my driversettings... I dont now on the fly how to do it with less equipment but it should be possible. Maybe one could write a little program for that. 

Ya something like that, but the voip I use is Raidcall.

There has got to be something out there that can do what I need done.

try googling "Play sound through voip" or "Share music on Skype"  something like that...