Soundpad is a program that allows you to output your local sound files as microphone signal, developed by Leppsoft from Germany. With its help, you can add any sound you like to your microphone input. This way, you can play various sound effects or background music in high quality whenever you want when chatting with others or playing games.

WavePad (full name: WavePad Sound Editor, WavePad Audio Editor) is a full-featured and professional audio/music editing freeware for home/non-commercial use. It doesn't need you to have too much basic knowledge for achieving advanced music editing, and is suitable for music lovers who want to manipulate audio files or create their own customized soundtracks.