Searching musical program witch plays a different melody C64

[johny new]

Is anybody there who can help me?

I am searching for an aplication - not a game - for C64. It's a musical program which plays a different melody under each key on the keyboard. Background on the monitor is a picture with a space ship Enterprice from Star trek. I think that some of the melodies were from games commando and chimera. I am also looking for another similar playing music aplication.
The background on the monitor is a picture of a cyclist on BMX. Does anybody of you know the name of this programs? I would like to have these melodies again.

Thanx.