Gramo's Attic

If spiders were magnetic this is how their webs would sound.

When we were little, we were told: "If you meet a daddy longlegs you will receive mail". We were also told that grammas have attics with dusty gramophone players. We know that spiders like attics but no one delivers mail there. What else can spiders do if not spin their webs and play music through those old gramophone horns?

(Gramo's Attic's size is variable)