Is there a way to send the music I'm playing over microphone? I don't have a microphone and want other people to hear music in for example MSN or other chat program.
If the program or chat that you want to use requires a microphone, you will have to get one. A computer mic is relatively inexpensive (many under $10 US).
Computer type PC/Desktop System Manufacturer/Model Number My Own Build OS Windows 7, 64 bit Home SP1, Win 8 Pro 64 bit CPU Intel i7 3770 Motherboard Gigabyte GA-Z77X-UD5H Memory 16GB GSkill Ripsaw F3-14900CL9Q-16GBXL Graphics Card Sapphire HD7770 Sound Card RealTek Monitor(s) Displays Viewsonic VA2448 Series 24" LED Screen Resolution 1920X1080
Keyboard Kensington wired Mouse Logitech Wireless PSU Antec High Current Gamer HCG-620M Modular Case Coolermaster HAF XM Cooling Corsair H80 Liquid cooling with aftermarket Nexus quiet fans Hard Drives 240GB Intel 520 SSD for Win 7
128GB OCZ Vertex 4 SSD for Win 8
1 TB Seagate drive for backup Internet Speed 40 MB/sec (Cable) Antivirus Microsoft Security Essentials and Malwarebytes Browser I.E9/Firefox Other Info Sonar X2 Professional 64 bit Recording Software with Roland Octa-Capture and MAudio Fast Track Ultra 8R recording interfaces, Frontier Tranzport wireless control unit, Behringer BCF2000 Control Surface.
Five USB connected optical drives for CD Audio production using Nero 11
Other systems: Desktop with i5 3550 CPU, LenovoZ560 Laptop with Win 7 64 bit HP, SP1, new iPad
I've not tried any of these, as I've always used a mic if I wanted to stream music to people in, say, livestream or skype; but I believe they're what you're asking for.