A level just isn't a level without some sort of sound in it, whether it be the sounds of computers in a computer room or a CD audio track.
Want to get those NPCs talking? Read on!
the low tech way...
Basic QERadiant & Half-Life & Editing Resources
Custom Sounds Tutorial
A perfect mixdown for your ingame sounds.
Play an MP3 in your mod's startup screen.
Recording and preparing sounds for use in HL. Some aspects also apply to Source.
How to loop those ambient_generic sounds.
determines the sound that each texture makes when walked on, hit, or destroyed.
Sounds on map!
How to convert sounds to proper HL format using Goldwave
A complete music tutorial for GoldSource-based games
To create atmospheric soundeffects, you need to keep several basic rules in mind.
Setting up equipment for noiseless recording
This is a complete list of EVERY .wav file from the pak0.pak file for Half-Life
Installing Custom Sound Files
I explain how to prepare sounds so they loop properly in game.
SOUND EDITING TUTORIAL
This is where the file 'sentences.txt' in alvesounds comes up.
How to add menu music
HALF-LIFE'S AMBIENT SOUNDS