Originally posted by griphon2
If you can't play it, you can't hear it.

I think of this quote being the other way around. "If you can't hear it, you can't play it.". You will hear alot of musicians use the quote, "I just play what I want to hear". So you are hearing it first, and the key to being a successful (not exactly rich and famous, but the musician you want to be) musician is by learning to play exactly what you want to hear. But yeah singing along with scales is probably the best training you could possibaly do.

People can sing in modes and not be musicians. Take people who just hum their favorite songs yet they can't play any musical instruments. Everyone has had experiences with different scales, although those who learn those modes are better at reproducing and understanding their sound. Everything has to do with the Ear, not so much knowledge. Untrained modes (scales) are just hazy but they are there. If you can hear it you can play (sing) it.