Videos
I modded the original annoucer pack with voice-overs all done through text-to-speech with the Daniel (UK) voice with reverb. At the moment, it only works on Summoner's Rift and Howling Abyss. I would like to make more exciting announcer packs and a tutorial on how to make them in the future, so this is just a basic start for me.
Download Link: https://www.mediafire.com/?2o7ki6ygjnmybyu
Video Demo (Doesn't include all sounds like victory/defeat)
How to install:
Download the soundpack
Find the location of the annoucer sound file (Annoucer_Global_Female1_VO.wpk). For me, that file path is C:\Riot Games\League of Legends\RADS\projects\lol_game_client_en_us\managedfiles\0.0.0.242\DATA\Sounds\Wwise\VO\en_US\Shared
Rename the soundpack to match the original and delete the original to replace it. I have attached an image below to show you what it should look like.
http://i.imgur.com/bEZjlfs.jpg
Edit: I decided to make another version of the voice pack with the plain voice. I am also working on a new exciting soundpack and a demo video for it. Stay tuned, folks.
Link to plain soundpack: https://www.mediafire.com/?dy8db7du0zyxnv2