How many chords does a musician need to know? How many does an amateur musician who plays mostly popular, folk and blues music, need to know?
My first answer has always been, “all of them” because you never know when you need them. But that’s not realistic. After all, there are thousands of chords you can play on a guitar or piano and you simply can’t memorize every one. Well, at least I can’t.
I know a lot of the basic forms: majors, sevenths, minors and so on – but I sometimes have to take a moment and think out something like a B#m7 or a Gsus4. I rely partly on the memory of the basic shapes, and partly on my understanding of how the fretboard works (so I can move a known shape up or down the neck as necessary).
But what about on ukulele, with its four strings – as opposed to the guitar’s six strings (and the piano limited only by the number of keys two human hands can press simultaneously – ten). Surely that must be easier? Well, not much, it turns out. What happens when a chord has five notes and you only have four strings?
Sure, if you stick to a few basic songs and a handful of major keys, you can probably get by with memorizing a couple of dozen shapes and be able to play a lot of contemporary music. But I am also playing some old songs from the 20s and 30s; songs that have jazz chords. Ninths, sixths. Suspended. Chords you don’t find a lot in modern pop music.