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