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https://digipres.club/system/media_attachments/files/110/477/388/985/240/473/original/40c90b5989eba0e8.png
The last interesting thing about the top of the PCB is that there's another speaker, labeled SP1.
There's two stereo speakers as well, so I suspect this is just used for PC Speaker, and was easier than merging the audio in with those other speakers
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