Can we talk about how awesome the music Riot has been making lately is?

Cause dayum. All the login music for the new Sion, Snowdown, Azir, the SRU, and now the start of S5 music on the PBE is amazing. Also in case any reds see this, would you guys be willing to share how you do all that? Do you have musicians and an orchestra at Riot, do you hire them when you need them, do you make the music artificially? Keep being awesome, music people! :)