4
« Last post by andyg on Today at 01:42:46 PM »
A piece being 'in the key of C' simply means that for the most part, it will stick to the notes in the scale of C and, most likely, finish on a C in the melody with a C major chord as the harmony.
You'll need more than one chord. Harmonies in a lot of tunes are based on the 1st, 4th and 5th notes of scale that goes with that key. In C major that would be C, F and G majors. They may need variants of those chords, adding a 7th to make G7, for example. And they may well use the minor chords based on notes 2 and 6 of the major scale. In C, that would be D and A minors. Many tunes will need more chords than that!
And there's a lot more to melody and harmony, scales and keys and how they relate to keyboard playing. Spend a little, find a keyboard teacher (not a piano teacher who may reluctantly teach keyboard - and often badly!) in your area or on line via Zoom. Better in the long run than floundering in the dark, building up bad habits that will be hard to shake off!