polarbear
... if you listen to a lot of modern pop music... for lack of a better description it's like "shimmering sparkles" that come in during the choruses. that description sounds awful haha. but listen to stuff like katy perry, lady gaga, kesha, one direction, rhianna. they all have it. it's not really real percussion, but that's the only way i'd know to describe the sound since it mixed in with the drum beat and picks everything up and makes it seem faster during the chorus.
It seems that from a dance/pop music area, nobody has directly addressed your question, so I'd thought I take a shot.
What you area really looking for is called FX (effects), and specifically called transition effects, especially a set of effects called risers. They are called that because they typically rise in pitch and tempo, and are used as transition sounds, to go from one section of a song to another.
There are may companies that produce FX loop packs, some of the more well-known are:
LoopmastersVengeance SoundSample Magic Also, it's not to difficult to create your own from scratch. If you have a sampler like Kontakt, then it's easy cut up and paste samples in small parts, then play them back with rising pitch, tempo, filter cutoff, delays, etc. Here's an example that's done with Ableton Live that you could also do in Sonar with a decent sampler as well:
Breakdown/buildup examples Hope this helps!