@glitterbag,
I remember the first time I tried out our new cutting edge "Stereogram" when our parents were out.
My two brothers and I (oldest one about ten) went and got an E.P (two/three tracks on each side, the same size as a single record) which had been sent to my Mum from our relatives in New Zealand.
Track one, side B was a full throated Maori Haka in glorious stereo.
We three practised all the singing and funny dancing until we got bored, then opened the windows and let it rip at full volume.
Seeing as we lived in a very quiet, very compact cul de sac of twenty bunched up houses, it took all of fifteen seconds for various adults to rush out into the road, wondering what the hell was going on.
We were banned from playing anything on the cutting edge Stereogram for a good long while.