This one part quest comes to us as soon as we finish Giovanni's Red Gears, Blue Gears quest. The Lava Rumble Recorder is a special item that will come back with Giovanni once you've got this quest in your quest log, so don't worry; no need to actually go hunting for it in your kingdom!
After you're done with this quest, Giovanni will give you his A Burning Question quest.
Make 7 pair of Reinforced Gloves
Send Giovanni to the Mount Cinder
Find the Lava Rumble Recorder