Just uploaded a video to my YouTube channel, it's the fantastic music demo for the 128k Spectrum by Frantisek Fuka. It featured on issue 111 of Sinclair User magazine back in 1991 which was one of the last Sinclair magazines I purchased before moving on to the Amiga platform.
I used to spend ages listening to all 26 tracks (A-Z), if you can name them all then I'll be impressed because I can't! You should recognise tunes from James Bond, Indiana Jones and E.T. You can find out more about the composer here.