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	  GTA-IVaud v1.1

 by Vilavek <vilavek@hotmail.com>

  vilavek.gamekage.com/gtaivaud/
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GTA-IVaud is an ivaud pcm audio replacement utility. It allows
modders to replace audio within ivaud archives which have been
extracted using other 3rd party utilities from rpf archives.

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Change Log
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--= Version 1.1 =---

* Fixed major compatibility issue with Vista 64-Bit

* Added improvements to ivaud header interpreter

* Added columns to display offset and length information


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Requirements
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- Microsoft .NET Framework 2.0
- Tested on Version 1.0.3.0 of GTAIV Files


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Credits
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Special thanks to 5050gs from YouTube for demonstrating that
an ivaud editor is possible!


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Audio Limitations
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Not much is known about the ivaud format. From what I understand it is meant
only to hold single channel or mono waveform data. When importing and
replacing sounds in an ivaud archive, please ensure your audio conforms
to the following format:

	PCM Signed 16-Bit, little endian, mono

Because GTA-4 makes use of modulating audio frequencies, such as
increasing or decreasing playback rates of loopable streams to give the
audible illusion of engines revving up and down based on speed, I suggest
replacing vehicle audio with audio files of the same frequency or sample
rates.


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What It Does
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- Opens the ivaud file format
- Extracts PCM data for editing
- Allows for replacing PCM/WAV format data within ivaud archives


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What It Does Not Do
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- Open the RPF file format
- Extract ivaud files from the RPF file format
- Display Filenames (filenames are not stored within ivaud files directly)


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Quick Tutorial
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1) Open an rpf archive using a 3rd party tool such as SparkIV or OpenIV
2) Extract the ivaud you wish to edit audio for
3) Open the ivaud in GTA-IVaud
4) Extract the specific sound(s) you wish to modify
5) Modify the sound(s) using a 3rd-party waveform editor (I use GoldWave)
6) Import and replace the original PCM/WAV inside the ivaud with your modified one
7) Import your modified ivaud archive back into the rpf file using SparkIV or OpenIV



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Legal
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This program is provided "as-is" without any implied warranty or support.
Use of modified files during online play may result in being banned.
Use at your own risk!

