Hi

I just bought the SC-PT956 DVD Player/Home Theater System and I just realized it doesn't come with a microphone. The only reason I spent $300 to buy it is to use it as karaoke machine. Then I thought about buying a wireless microphone but it costs over 100$ and I also found out that someone other brand of dvd players (about 30-50$) that has the mic home. Anyway, I don't know anything about home theater system, so could anyone help me please?