When creating a chord progression, how do you determine whether the notes that make up the chords should resolve downwards or upwards?
For example, a Perfect 4th interval, when it’s formed from the lowest note of a chord along with any of the other upper voicings, gives a "dissonant" sound and results in it’s wanting to be resolved. The way to resolve this, as I've been told, is to resolve it downwards to the 3rd.
1) What exactly does that mean, to resolve "downwards to the 3rd"? Please share examples of a basic chord progressions that shows this movement.
2) Furthermore, I've read that dissonant notes want to resolve downwards, or relax, into its resolution. Why?
3) Are there common, or practical, uses for resolving upwards? Would one direction be more or less effective than the other or provide a totally different "resolving" effect? If so, could you share examples or an explanation, please?
4) In regards to a Perfect 4th again, why, when played on its own, is the upper note (C-F in C Major) perceived as the root? I thought the root is always the first note in the chord or order of notes? How then would the upper note of F be perceived as the root?