>>28399411. Human error check: first, confirm that your system actually outputs audible audio at all. Confirm that you have nothing muted to prevent audio output in your videos and that the same player you're using to check your video outputs plays audio tracks of other files.
2. Deprecation check: make sure your MMD version is up to date, 9.31 or higher, and there is no flag such as "not play WAV file" (3rd from the bottom in the file menu). Could also update your drivers while at it.
3. MMD function check: confirm that your video outputs contain an audio track by any means available to you, which could be: a video editor that allows splitting AV containers, K-Lite Codec Pack file properties feature, FFmpeg functions, etc. Regardless, proceed to step 4 but then return to 3 if no track.
4. Codec check: if an audio track is present and you don't hear the audio, you might not have the required audio codecs installed. The absence of ffdshow in your list indicates the absence of K-Lite Codec Pack in your system, which could include what you need.
5. System check: you can also check if the audio works by playing a converted video (WEBM/MP4) in browser/another player or uploading a video output to another device you can access.
6. Audience help: if all else fails, you can record a short video (up to a few seconds), catbox it without converting, and share so that others might have more of a clue.
7. Finally, in the event you're the same guy who has had several similarly mysterious issues with MMD in the past that mysteriously solved themselves a little while after brainstorming attempts without establishing connection to those attempts, this will probably solve itself too.
