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Audio Note: Computer audio is not transmitted when using screen share on any video conferencing platform. If the other person hears your computer audio, it is from your mic picking it up from your speakers.
If the other person cannot year, you can try raising your speaker volume, but sometimes your system will "cancel out" the audio because it thinks it is you talking.
Audio is transmitted if you use the YouTube, Uploaded Video, or play recordings in Blink Lesson.