I hacked my Wii Guitar Hero Guitar so it can actually be played like an instrument, with up to 45 different pitches at my disposal.
I play (with one or two minor mistakes) the verse, chorus and solo to "Smells Like Teen Spirit", by Nirvana, to demonstrate this.
My television makes a lot of noise. I placed my digital camera by my TV, below my speaker, when the TV was on volume 20 (normal TV watching volume).
I muted it, then turned off the TV, then unplugged it. Hear the sound difference of the fans.
More info on my piece of crap can be found here:
http://ilovetohat etoshiba.blogspot.co m/