- The audio files need to be in BIK format, which can be done through RAD Video Tools (the mp3 files here are for reference only and are not used by the game at all)
- Up to 20 variations of each voice line TYPE can be supported by the game. (20 bail lines, 20 intro lines for example)
- To get it sounding right, try to make sure the audio is as loud as you can reasonably make it, and in mono

the voicepack.ini has two parts

the first part simply has info abou the mod PACK
-------------------
[ModInfo]
Name=example
Description=example
Author=scrapyard
Version=1.0

the above text affects what shows in the rethawed launcher
-----------------------

The second part is where the magic happens
-----------------------------
[VoicepackInfo]
Name=Example
ID=Example
Description=Example Description

BailLines=ExampleBail1
BailLines=ExampleBail2

TantrumLines=ExampleTantrum1
TantrumLines=ExampleTantrum2

GoLines=ExampleGo1

IntroLines=ExampleIntro1

SmackLines=ExampleSmack1
SmackLines=ExampleSmack2

BumpLines=ExampleBump1
BumpLines=ExampleBump2
BumpLines=ExampleBump3
BumpLines=ExampleBump4
--------------------------
The ID is needed for the game to comprehend your voice pack
The name and description is shown to the player on the voice selection screen

Everything else is to tell the game what voicelines exist for this pack, and what type each is.
You don't need an exact number of any.

BumpLines=ExampleBump1   <-- this line tells the game that there is a "bump line" with the filename "ExampleBump1.bik"