I accidentally found it on the local web:
ZXNet echo conference «music.zx»
Hello, alexeenko
Here are these two music in MP3 format:
1.Big Alec Pym cooper KaahBaahNaah
2.Beast - if pigs could Fly Mashine :v2_walkm;
Musicians; Well, they remind me sooo much of AY. Where did they come from in our grid and
I don’t know whose they are.
Those who want to spend traffic here
[http://zxaaa.mylivepage.ru/file/203/1678/ZX+Spectrum+Music+mp3.zip]. (6.63 mb)