对音乐知识一窍不通的人person who knows nothing about music

• 为了做提琴，我这个音盲，得从五线谱学起。

  As someone who knew nothing about music, I had to learn, starting from the stave, in order to make violins.

• 你是个五音不辨、锣鼓不分的音盲吗？

  Are you a tone-deaf person who knows nothing about music and cannot tell a gong from a drum?