I am sitting in a cigar lounge, and under the jazz music playing I can hear this strange, rising and falling tone, that sounds similar to one of those weird tubes you can find at a fun fair. You tilt the tube this way, and tip it that way, and a weight moves in the tube and creates a weird tube sound. The pitch seems generally to descend or ascend (with some local irregularities) depending on which direction the pipe is tilted and what it's previous state was.
The guy packing boxes in the corner with the adhesive packing tape seems to be creating a sound similar to this as he draws out long sections of tape from the roll.
I am wondering if there is a physical explanation for the sound made by the dispensing of packing tape, and what this explanation would be?