1) The most important-what are melody and harmony, and how do they tie into the music? I've been following the other thread which is meant to explain melody but I'm still lost. I know melody is not the rhythm, but that's all I understand. I don't know the difference between harmony and melody at all. 2) (I'm thinking I have this right, if I'm not please correct me). Take a melodic minor scale-C minor, for instance. In the melodic minor scale, when it's ascending, it'd only be the E that's flat. But when it's descending, the B and A revert to being flat as well. Why is the melodic minor organized this way? How would this relate to music? Say if I wrote a piece in C melodic minor, then does that mean I can use C, D, E, Eb, F, G, A, Ab, B, Bb, and C? Or would it be only when I was going down the scale, or at least, more down the scale than up, when I could use A and B flat? 3) Keys. If something is in the key of C, then that means I can use C major, minor, melodic minor, and harmonic minor and still be musically "correct" right? 4) Relative minors. Say I was in the key of C, then that means I can use A minor and still be musically "correct", no? But A minor is in a completely different pattern than C major, so it should sound somewhat different than the C major scale unless I make a really odd riff, right? 5) I know any instrument can be used for anything. But when bass pounds out root notes of the guitar chords, is it being a rhythmic, harmonic, or melodic instrument? I know this ties into question #1, and that guitar can be used as anything as well, so just take "Dust in the Wind" by Kansas as an example--it doesn't have a bass part, but if the bass played exactly what the guitar played, would it be considered rhythm or one of the other two? I'm thinking one of the other two. Sorry this is so long; thank you for taking the time to read it.