Episode 12 What Is the Key of a Song?

This free guitar lesson answers the question "What is the key of
a song?" You learn about tonic pitches, relative major and minor,
modes and key signatures. You see that the key of a song doesn't
always reflect the true parent major scale and it's up to you to
go beyond the basic details and sort out the other components at
play. Taught by Desi Serna of http://GuitarMusicTheory.com.