My Gran played piano, but was self taught and could genuinely play by ear. She could rattle off classical pieces without any music in front of her. My sister learned piano to Grade 8, my brother oboe and sax to Grade 6 My wife learned violin to Grade 7, her twin sister sax and clarinet to Grade 6, her older sister piano to Grade 5. Apart from my wifes mother still playing piano, I am the only member of the close family that plays an instrument regularly. And I am completely self taught, with no formal training. And my two kids have shown virtually no interest in playing an instrument at all. My son has a set-up drum kit that gathers dust in his room. Go Figure!!!