There was a great music composer, on which you could write three tracks, and even mix them on screen!
I spent ages typing in another synthesizer programme copied from the red book of new games etc., and a daughter used it in a school project. One day, during computer studies, she was asked to remain out of the classroom for a few minutes, and when she was eventually let in, she found that they'd loaded the music tape she'd prepared onto all the other Amstrads in the class and the noise was deafening!
And that's her job now, training in computer systems, so that was OK wasn't it!