I do like washi tape, and have found it does better than cellophane tape on areas that need repeated folding. I prefer my sheet music to lay flat, rather than stapled, because it makes it easier to set on the piano or a music stand. Scotch tape or cellophane tape just doesn’t make a good hinge, as it easily tears lengthwise.

I start with a 1-2 millimeter gap between pages to allow for the fold, then apply a strip of washi tape on both sides of the gap. I trim the edges with scissors after applying.

As an added bonus, washi tape comes in pretty colors and patterns.