Etymonix SoftReel 

Exceptional-quality MMX-optimized software-only MPEG-2 video decoder filter provides playback of MPEG-2 and Super Video CD files in DirectShow applications. Ideal for kiosks, presentations or watching video clips. Licensing available to developers.
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mp3-2-wav converter 

This MP3 decoder lets you convert MP3 files to WAV files. It can also normalize the resulting files, to avoid inconsistencies in volume.
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DVD to MPEG VCD Converter 

DVD to MPEG Converter is an easy to use and powerful software - DVD decoder and VCD/SVCD/DVD Mpeg encoder that combines the great picture and sound with full featured DVD navigation
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Complete Audio Converter Pro 

An audio encoder/decoder (converter/player) and CD ripper utility for Windows. Supported formats: MP3 (including VBR), WMA, WAV, ADPCM, GSM, DSP, MP2, PCM (uncompressed Wave), OGG Vorbis, G721, G723, G726, A-LAW, U-LAW and RAW.
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Complete Audio Converter Lite 

Complete Audio Converter Lite is an audio encoder/decoder (converter/player) utility for Windows. Supported formats: MP3 (including VBR), WMA, WAV, ADPCM, GSM, DSP, MP2, PCM (uncompressed Wave), OGG Vorbis, G721, G723, G726, A-LAW, U-LAW and RAW.
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RSP OGG Vorbis Player .Net 

.Net framework library to play OGG Vorbis media files , the decoding engine is loaded dinamically in the process , the processor time required to decode the OGG Vorbis is less than  MP3 files, the decoder quality is very good or better than MP3 files
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