Since we're not at the pole, a full rotation wouldn't take 24 hours, but I don't know what the correct number would be.
The UN has one in the main lobby, with a weight of 200lbs and a length of 75ft.
I used to work there, so know that getting the permission to attach a microphone and speakers to their setup would take about 2 years for all the approval to happen.
Initial Sound idea - hearing the components of a sound rather than just its 'meaning'.
Listen to these sounds.
When really slow they sound musical.