They said they will add sounds to the editor soon-ish

引用自 obvious：

They said they will add sounds to the editor soon-ish

Yes, we are working on it and we'll add it in the one of the future updates ;)

The only way there exists now is to use falling sound similar to door opening (book falling for example). Place an item on an animated cube shape. When cube does a fast vertical bounce movement, the book goes up in the air and falls back down on the cube, so this can be repeated. Make sure the item doesn't fall of the cube by adding some barier around it. If the sound feels delayed you can try tuning the timings or adding another cube above it to make the trajectory shorter.

You can add a sound of a drawer to the door.