# The CELT ultra-low delay audio codec — WebsDocs ASG Directory Profile

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Business summary:
The CELT ultra-low delay audio codec —The CELT codec has been merged into the IETF Opus codec and is now obsolete— Home News Comparison Samples Downloads Documentation Presentations Software Contact --> The CELT ultra-low delay audio codec Overview The CELT codec is a compression algorithm for audio. Like MP3, Vorbis, and AAC it is suitable for transmitting music with high quality. Unlike these formats CELT imposes very little delay on the signal, even less than is typical for speech centric formats like Speex, GSM, or G.729.

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