Welcome to the SoundMark experiment!
In the next few minutes, we'll ask you to "purchase" 10 songs out of 30 with our music preview interfaces (you do not need to pay).
We'll show you two different user interfaces, each with a different method of previewing tracks, each of which allows you to choose 5 songs before "checking out". Upon checkout, you'll see a special code that you need to copy into our survey.
Once you submit our survey, we'll grant you access to the songs you "purchased" in return for your effort :-).