Huh, I didn't realize pipewire had builtin support for this! I've been using a different piece of software called Easy Effects[1] on my framework laptop.
To equalize my laptop, I ended up buying a umik-1, and using REW to calculate all the filter coefficients (you can import REW's filter export right into Easy Effects). It's a subtle difference at first, but it's much cleaner (I also usually have a compressor and loudness effect enabled, as the framework speakers are pretty quiet).
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