MP3 Encoding: Bit Rate Delineation Between Channels

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When selecting a bit rate of 192 kbps for a 16-bit, stereo, 44 kHz sound file, the bit rate does not translate to 96 kbps per channel. Instead, the channels are effectively combined in a joint stereo format, which optimizes storage by only recording differences between the channels when they are significant. This approach allows for more efficient use of data while maintaining audio quality.
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My question is regarding bit rate delineation between channels. If I were to select a bit rate of 192 for a 16 bit, stereo, 44khz sound file would that rate translate to 96kbits per channel or are the channel effectively combined as one?
 
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They are combined (joint stereo) to save space they only store a difference between the channels when it is significant
 
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