Thanks for the help, here are a few links to the Go Box that this HC05 journey was all about
Next we'll see about audio :>)
but I think a little break is in order.
"You see, wireless telegraph is a kind of a very, very long
cat. You pull his tail in New York and his head is
meowing in Los Angeles. Do you understand this?
And radio operates exactly the same way: you send
signals here, they receive them there. The only
difference is that there is no cat." Albert Einstein