In the early 70's, I bought a vinyl disk about Claudio Monteverdi's music. I just saw that on Youtube all the music is available as seperate movies. I imported all the files of the disk with the fantastic MovieSherlock software and put all this in action in a Hype web page which runs perfectly.
The issue is that if I change from tunes to tunes, I must check that all other 9 pieces of music will stop because there is no Close all Sougs in Hype but a per sound close. Said in another way, if I choose track 4 per example, I must close all other tracks that might be playing. This is why you will see all those icon speakers.
I suggest that Hype programmers include such a general close command. You may see this at the following web address.
Thanks for your suggestion and help