This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Tomcat handles HTTP, which is a poor choice for streaming audio. The Java Multimedia Framework supports streaming via RTP (Real-time Transport Protocol) and RTSP (Real Time Streaming Protocol). Give it a look.