I came across this writing in a ukulele tab.
I assume H means half and E means eighth, but what could the "H.=H" mean?
H.=H
Q Q. E E E E E E E E E E E E E
|-7---5----10-|-3-3-----0-3-|-8---8-10-12-15-|
|-0-----------|-1---1-3-----|---8------------|
|-0-----------|-0-----------|----------------|
|-2-----------|-2-----------|----------------|
As you can guess, I haven't got a big solfège education.