"most or, perhaps, all of what the BBC has broadcasted the last few years on source singers I've heard."

So, pretty much nothing at all. As mandotim says, I asked you for names. If this is the way music was played and sung for centuries on WHICH SPECIFIC source singers are you basing your evidence?

By the way, tyhe term should be "has broadcast", not "has broadcasted". Do keep up, old bean.