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@pixel plugging in a headphone jack then removing it allows the speaker to work. I think it's a known issue. I found this from another thread.
@msiedlaczek strangely my audio didn't work until I plugged in headphones, but once I unplugged them the speakers are playing audio just fine, and then stopped again after I paused my video to type this
@msiedlaczek also me, on my OPO, have the same issue