aacPlus: Small Size, Great Audio Quality


It enables us to fit 3000 music tracks on a 4GB memory card! Amazing!

MPEG-4 aacPlus is the combination of three MPEG technologies comprising Advanced Audio Coding (AAC), coupled with Coding Technologies’ Spectral Band Replication (SBR), and Parametric Stereo (PS) technologies. SBR is a unique bandwidth extension technique which enables audio codecs to deliver the same quality at half the bit rate. PS significantly increases the codec efficiency a second time for low bit rate stereo signals.

SBR and PS are both forward and backward compatible methods to enhance the efficiency of any audio codec. As a result, aacPlus delivers streaming and downloadable 5.1 multi-channel audio at 128 kbps, near CD-quality stereo at 32 kbps, excellent quality stereo at 24 kbps, and good quality for mixed content even below 16 kbps mono. This level of efficiency fundamentally enables new applications in the markets of mobile and digital broadcast.

Features
• True Superset architecture
• Multi-channel support for 5.1, 7.1 and beyond (48 channels total)
• Built-in error concealment for mobile applications
• CD-quality stereo down to 48 kbps
• Near CD-quality stereo at 32 kbps
• Excellent quality stereo down to 24 kbps
• Widest available audio bandwidth

Example applications
• 3G mobile music and A/V services
• Internet audio for streaming and download
• Digital Radio
• Digital Satellite and Cable broadcasting
• IPTV
• Portable players

Independent quality evaluations of aacPlus

aacPlus v1 has been evaluated in multiple 3rd party tests by Digital Radio Mondiale, MPEG, the European Broadcasting Union, and the Institute für Rundfunktechnik IRT. aacPlus v1 outperformed all other codecs in the competition. Below is the results graph from the European Broadcasting Union testing at 48 kbps stereo.

My take on it:

It means smaller size but the sound quality remains the same or greater than a MP3 file. Depends on your device, it might sound good also might not. If you compare this format to MP3, you will find such difference with it. aacPlus sounds less crisper than MP3 as it uses Parametric Stereo and SBR. I think this format is suitable and sufficient for portable media devices and radio streamings. For home theater systems, the sound quality is less pleasurable and somewhat tinny compared to MP3 and WMA.

Source: Coding Technologies

Convert Music Files

You can convert your music files into aacPlus using Easy CD-DA Extractor by Poikosoft.

Instructions:
1.Install the software
2.Open the program
3.Choose the music files that you want to be converted
-You can drag the music file to the program window
4When choosing settings, be sure to pick this one.

48kbps.png
After that, click convert files. The file conversion might take fast as 10-15secs depending on your computer’s processor.

Comparison between file sizes after file conversion

compare.png

There you go, the source file(MP3) which is 3.6MB(128KBPS). After converted to aacPlus, the file size had been much smaller 1.4MB(48KBPS). In my listening tests between the two files, there no such difference.
It’s equally pretty the same but not in size. I really recommend aacPlus to all. Plus, aacPlus format is designed to work for Nokia XpressMusic phones. That’s why i’ve manage to put 200 songs on my Nokia memory card.

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12 comments

  1. Yeah. I do agree. I think it’s because of license issues. It will cost mp3 player manufacturers a lot. As of this time, only some mobile phones and the IPOD can support this format.

  2. i used it in my n5200 and sounds like theres no difference
    on a 128kbps mp3 format, more songs can be put in a 512mb microsd
    ….

    i convert my msg alert tone in 16kbps aacplus v2 format with no prob at all..

    ..and yeah i’ve always make my 3gp clips with aacplus v2 as my audio codec

  3. are there any free softwares, similar to this one? i’ve downloaded this software but it expired already. are there other softwares I can download?

  4. Hey Jamie,
    try finding easy cdda on http://www.softarchive.net, click on portable or just search “portable easy cdda extractor” that didnt have any expiration i’ve tested it in my box and the nice thing is you dont have to install it to your pc thus you can carry it on your microsd card way around computer shopzzz… thats 20mb below so spare some space on your card

  5. :/ this 48kbps is not good :/
    i uset SUPER and make to 128kbps.

    all songs is bigger than 128kbps

    all rock songs is 320kbps club ~200kbps

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