In pass-through mode, Yuhan Blu-ray Creator and Yuhan 4K UHD Creator sometimes cannot recognize PCM audio in certain file formats, such as MP4 or MOV. To fix this, you can use the free tool MKVToolNix (https://mkvtoolnix.download/) to remux the original video into an MKV file.

After remuxing, Yuhan Blu-ray Creator and Yuhan 4K UHD Creator should be able to perfectly preserve the PCM audio.

If you still experience issues with missing sound, please contact support@yuhanmedia.com for assistance.