Just another thought - the 'tone deaf' debate:

There is evidence that some people are 'tone deaf', but this, by definition, means that they cannot distinguish between high or low sounds, everything appears to them as a monotone.

Anyone who has learned to play a musical instrument cannot be tone deaf (don't cite Elaine Glennie, as her profound deafness developed after her musical career), unless they literally are treating it as a 'typewriter' and are unable appreciate the music they are making.

If you can recognise a tune you ae not tone deaf, and, more importantly, you can be trained.

Just thought that may need clarifying!!