Convert .AFC to AA3

Convert .AFC to .AA3

Mass Effect 2 Audio File (.AFC)

AFC (Mass Effect Audio File Container) is an audio container format developed by Canadian video game development company BioWare for their Mass Effect science fiction video game series based on the Unreal 3 Engine.
Being a container format, an AFC file can contain one or multiple audio streams. The audio data stored in AFC files may represent either speech, background music and/or sound effects used in the game.
In its essence, an AFC file is just a regular OGG file with audio data encoded as RIFF WAVE via the WaveWorks Interactive Sound Engine (Wwise). The only thing that makes AFC files different from regular OGG files is the file header, which is slightly different.
AFC files usually have a sampling rate of about 32000Hz at a variable bit rate (VBR) ranging from 75 to about 105kbps. There are currently no desktop media players that provide AFC playback natively. However, there is a good number of independently developed AFC conversion tools such as afc2ogg or the Gibbed Mass Effect 3 Audio Extractor, which allow users to easily convert AFC files to OGG and play them back in any OGG-compatible desktop media player.

Atrac3 Audio File (.AA3)

AA3 (ATRAC3 Audio) is a proprietary compressed audio file format developed by the Sony Corporation and used extensively in most of their audio and video editing applications such as Sony Vegas, Sony Sound Forge and Sony ACID. The AA3 format is also a common choice among game developers for storing game sounds and is also used for storing audio data on CDs and MiniDiscs.
Audio data stored in AA3 files is encoded with the Adaptive Transform Acoustic Coding (ATRAC) algorithm. The ATRAC algorithm was originally developed in 1992 by the engineers from Sony, working in close cooperation with engineers from the LSI Corporation, having the aim to create an algorithm that allows encoding at high speeds with the lowest possible amount of power consumption (one of the reasons why, for example, batteries on Sony Walkmans last longer when playing ATRAC files rather than MP3). This led to the succesfull implementation of the ATRAC1 algorithm. With the addition of numerous improvements to the codec, ATRAC3 saw its release in 1999, followed by ATRAC3plus in 2002. AA3 files are based on the ATRAC3 and ATRAC3plus algorithms.
ATRAC3 is a complex sub-band coding algorithm, where the raw signal is split into four sub-bands through three stacked quadrature mirror filters (QMF). Modified discrete cosine transform (MDCT) is then applied to each subband, leading to a further compression of the signal. On the other hand, ATRAC3plus relies on 16-channel QMF filtering, followed by Generalized Harmonic Analysis (GHA) and a 128-point MDCT. Naturally, ATRAC3plus provides better audio quality compared to ATRAC3 and is therefore used on a broader set of devices, such as the Sony PlayStation 3 and Sony Hi-MD Walkmans.
The major downside of the AA3 format is that it lacks decent cross-platform support.

Convert Mass Effect 2 Audio File to Atrac3 Audio File

How to open .AFC Mass Effect 2 Audio File files?
Windows
  • afc2ogg
Mac
Linux
iOS
Android
How to open .AA3 Atrac3 Audio File files?
Windows
  • Vegas
  • Sound Forge Audio Studio
  • ACID Music Studio
Mac
  • Sound Forge Audio Studio
Linux
iOS
Android

.AFC to .AA3 converter

Disclamer: .AFC to .AA3 converter is provided to give you some guidence about how to convert files from .AFC to .AA3. You might need to purchase certain software to do the actual conversion.

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