The phrase "right channel" refers to the specific side or path through which sound or information is transmitted in stereo systems or audio recordings. Full definition
The sleek and powerful sound bar provides a wide separation between the left and right channels for more accurate stereo sound. (ecoustics.com)
For users with the problem, the wireless earbuds may both play the left or right channel of audio, instead of splitting the stereo stream appropriately. (techradar.com)
The respective ear cup knows to separate the left or right channel from the cable. (techhive.com)