Amazing, but strange problem.

I love this app, Ive recorded about 63 songs on it, but for some strange reason today it has stopped making any sound, let me explain. Simply, I was tapping the drums doing everything I can to test the sound, but...there was no sound, no drumming and definitely no music. It sounds confusing but simply put, I CANT HEAR ANYTHING! Other than that, I find it fascinating and fun, keep it up!

Fashion princess:)#1 about GarageBand, v2.2.1