core.ac.uk. Dwi Indah Purnamawati, M.Si Muhammad Sholeh, S.T,M.T Dr. Ir. Amir Hamzah, M.T ... We...
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core.ac.uk. Dwi Indah Purnamawati, M.Si Muhammad Sholeh, S.T,M.T Dr. Ir. Amir Hamzah, M.T ... We choose video channel because it has wider bandwith than audio channel