No sound on any of the games

[DingoSwann]

Launcher Version: 242

Operating System: Windows 7

Java Version: Version 7 Update 21 (build 1.7.0_21-b11)

Antivirus Program:

Description of Problem:

I've no sound in-game.

I know my PC is fine as everything else I do works fine.

I've tried Tekkit and Tekkit Lite and neither has sound.

Error Messages:

Error Log:

[DingoSwann]

I've also tried removing and re-downloading Tekkit