hello.
As you can see, there was a problem that the sound of the lecture was low, so we tried to solve it.
All videos have been re-uploaded after increasing the volume and re-rendering .
Other lectures will be like that too,
First of all, this lecture was held first.
Sorry for the inconvenience :(
If there are any other problems or abnormalities in the video,
Please send your email to pronist@naver.com . Thank you.