Bandwidth and sampling rate[edit]

[gentlebarman]

Bandwidth and sampling rate[edit]​

See also: Wideband audio
Opus allows the following bandwidths during encoding. Opus compression does not depend on the input sample rate; timestamps are measured in 48 kHz units even if the full bandwidth is not used. Likewise, the output sample rate may be freely chosen. For example, audio can be input at 16 kHz yet be set to encode only narrowband audio.[23]

Abbreviation	Audio bandwidth	Effective sample rate
NB (narrowband)	4 kHz	8 kHz
MB (medium-band)[note 1]	6 kHz	12 kHz
WB (wideband)	8 kHz	16 kHz
SWB (super-wideband)	12 kHz	24 kHz
FB (fullband)[note 2]	20 kHz	48 kHz