AIF to MPA: Convert Audio from AIF(AIFF/AIFC Apple Audio) to MPA(MPEG Audio) with River Past Audio Converter, AIF2MPA converter, conversion
What is
AIF?
Short for Audio
Interchange File Format, a common format for storing and transmitting sampled
sound. The format was developed by Apple Computer and is the standard audio
format for Macintosh computers. It is
also used by Silicon Graphics Incorporated
(SGI).
The AIFF format is uncompressed so AIFF files tend to be large. However,
there is another format called AIFF-Compressed (AIFF-C or AIFC) that supports
compression ratios as high as 6:1.
AIFF files generally end with an .AIF or .IEF extension.
AIFC files generally end with an .AIFC extension.
AIFF and AIFC are standard audio format used on MacOS systems. AIFF is not
compressed. AIFC is compressed.
Windows can decodec uncompressed AIFF. However, to decode AIFC, you
need to have Apple QuickTime
installed.
What is
MPA?
There are three "layers" in the MPEG-1
Audio specification.
In MPEG Audio Layer-1, a simple 32-subband audio compressor using a floating
point representation for subband samples. Resolution and scale factor are stored
for groups of 12 subsamples. MP1 is only used for Philips DCC Digital Compact
cassette with data rates of 384 kbps.
Both MPEG-1 and MPEG-2 files use MPEG-1
Audio Layer-2.
MPEG-1 Audio Layer-3 becomes
the widely popular MP3.
MPEG.ORG is an excellent source for additional
information on MPEG format and usage.
To encode MPEG Audio, you will need River
Past MPEG-2 Booster Pack in addition to your audio software.
Additional Requirements
To convert from AIF(AIFF/AIFC Apple Audio) to MPA(MPEG Audio) audio with River Past Audio Converter, you must have River Past MPEG-2 Booster Pack installed.
Launch River Past Audio Converter
Once River Past Audio Converter is installed properly, launch Audio Converter.
Add File
Click on the "Add File" button on the tool bar. The standard file open dialog appears. Select "AIFF/AIFC - MacOS AIFF" in its "Files of type" combo box.
Select the file you want to convert and click "Open". The file will be added to the conversion file list.
If the AIF file is uncompressed (normally with "aif" or "aiff" file extension), Windows should be able to decode it without any problem. However, compressed AIFC files may require QuickTime.
If you cannot add the AIF file, you may need to install QuickTime. We use QuickTime to decode compressed AIFC files.
River Past Audio Converter
Select Output Format
Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "MPA - MPEG Layer-2" as the "Audio Type".
You can change the sample rate, channel (stereo or mono) and bits/sample, and bitrate.
Note: The MPEG-2 Booster Pack must be installed for the "MPA - MPEG Layer-2" output option to show.
Select output directory
Expand the "Output Directory" panel. Use the "Browse" button to select an output directory.
Convert
Click the "Convert" button on the tool bar.
River Past Audio Converter
