HOW TO INSTALL:
place the folders included into User > Mods > Sounds

Once in-game go to Config > Audio > Mods and change the soundpack being used to the pack of your choosing.

Make sure custom sounds are switched "on"

Save

CREDITS:
All sound effects belong to their respective creators from the original games:

Wipeout HD Fury - Majority of sound effects and voice lines
Wipeout 2097 / XL - checkpoint, weapon pick up sound, recovery drone
Wipeout 2048 - Weapon warning voice lines
Wipeout Omega Collection - Engine, Barrel roll, Turbo, Plasma fire, Cannon fire, Countdown voice lines

All 6 versions of the soundpack are the same except for the weapon warning voice lines.
Default uses voice lines from Wipeout HD as warnings, and the others use team specific voice lines from Wipeout 2048 instead.

Special thanks to Snozzly for help with extracting Wipeout HD sound effects