My bass has several frets were it produces a buzz when I play it. Does anyone know what this could be? I have a acoustic/electric sideways bass, in case that helps.
I think I know what you mean by sideways bass

Sounds like it just needs a set up.
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Either the strings are too close too the fretboard or you're not holding the strings down hard enough. If you're really pressing down on the fret and play it a few times and it stillbuzz, you need to bring the action up.
Not hard -- there are instructions in the Bass FAQ. But acoustic basses and acoustic instruments can be a bit more finicky than electrics, so if what you read doesn't quite make sense, I would take it to a shop and see if they can do a quick setup and ideally let you watch what they do.