Audio Codec is a speech codec for Windows Media Player, recommended by Microsoft and created by VoiceAge, a well-known speech and audio codecs supplier. Codec is appreciated by RealNetworks, too, as they use it to encode speech with superior results.

The sounds encoded with Codec at 16 kbps have almost the same quality as the MP3 format at 64 kbps. Other standards using Codec are EFR GSM, IS-136, TETRA, G.723.1, G.729 and G.729 Annex A.

Additionally, the latest versions of this application have been optimized for online use, meeting the demands of both networks and PCs.

Thus, this technology can be used for broadcasting over Internet, multimedia conferencing and multimedia email.

It is expected for the Codec to gain more popularity in time and become widespread. It is already appreciated by RealNetworks and Microsoft; it is used as a low bit rate speech codec in RealAudio and Microsoft’s Media Player and Audible.

The Codec contains a dual rate codec (8.5/6.5 kbps), a fixed-rate codec (5.0 kbps) and a wideband codec (16kbps). Bit rates are changed automatically by the codec when necessary, in order to deal with network inconsistencies.

The main advantage of this technology is minimizing consequences of errors while improving error correction possibilities in case of data losses. The communication channel becomes more reliable using frame concatenation and interlacing.

When Codec is missing, the audio codec tag 130 should be displayed. Codec is a compact and reliable tool which will make it possible for you to play audio files using standards based on the ACELP technology. The codec comes completely free and is easy to install and use.

Speex: is an Open Source/Free Software patent-free audio compression format designed for speech.

Speex Voice ACM Codec: the Speex ACM wrapper allows you to use Speex voice compression codec in WAVE and AVI files on any 32 bit Windows operating system!

5 Codec 3.02
on 20 June 2011 , reviewed by:

I was no able to play asf files on WMP11 on my vista machine and finally Codec solved ...

5 Codec 3.02
on 15 March 2010 , reviewed by:

Thanks for this codec. It solved my .wav problem in windows 7

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