The channels property of the RTCCodecStats dictionary is a positive number containing the number of channels supported by the codec.
For audio codecs, a value of 1 specifies monaural sound while 2 indicates stereo.
A positive number indicating the number of channels.
codecs.channels option in parameter passed to RTCRtpTransceiver.setCodecPreferences() and RTCRtpSender.setParameters().codecs.channels in object returned by RTCRtpSender.getParameters() and RTCRtpReceiver.getParameters().