At the core of Sound Tool is a simple concept: bigger = louder.
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As music increases in volume it grows exponentially in it’s presence and quickly becomes something you can not only hear, but even feel. A turn of a knob doesn’t do justice. The interaction of Sound Tool was inspired by literally grabbing the music and making it bigger...

Sound Tool’s pull loops provide an easy user experience: pull on the loops to open it up. 
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The loops also make Sound Tool hang-able. This creates a way for it to live hanging on a hook and creates another interaction. When it hangs, pulling down on the loop open it up like a window shade, similar to Naoto Fukasawa’s famous CD Player for Muji.