Sorry if there's a better forum - thanks to the staff moving the thread if necessary
Even if it's not about strings, "7" is a theme for numerous people
I don't want to introduce a religious thread : 7, the week, the Bible,etc...
more than explanations, here is an example :
Moonchild / Iron Maiden :
Seven deadly sins
Seven ways to win
Seven holy paths to hell
And your trip begins
Seven downward slopes
Seven bloodied hopes
Seven are your burning fires,
Seven your desires...
on the Seventh Son Of A Seventh Son album............of course !
So, like the famous actor of "Ocean seven and four" : what else ?