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+CELT is a very low delay audio codec designed for high-quality
+communications. Traditional full-bandwidth codecs such as Vorbis and
+AAC can offer high quality but they require codec delays of hundreds
+of milliseconds, which makes them unsuitable for real-time
+interactive applications like teleconferencing. Speech targeted
+codecs, such as Speex or G.722, have lower 20-40ms delays but their
+speech focus and limited sampling rates restricts their quality,
+especially for music.