I would love to have the jingles from the actual play podcast “Tabletop Gold” - http://www.tabletopgold.com.
In particular, the sounds for Roll for Initiative, Critical Hit, and Critical Miss.
With the Syrinscape Creator you can easily add those yourself to use
Do I need to be a super subscriber for that?
Yes, with a Supersyrin subscription you can use Syrinscape Online, or the Syrinscape Web Players in built Creator to add your own sounds and music, create your own soundsets or copy and edit existing ones. Additionally you unlock access to all of the wonderful Community Content that others have built and shared