Filter pedals are ideal for adding vocal-esque, funky effects to your guitar and bass lines. They work by shaping the frequency peaks - similarly to an EQ - and using a Low-Frequency Oscillator to “sweep” between the frequency spectrum. This results in an automated wah-like effect that is used to great effect on funky guitar and basslines.
These pedals can let you adjust the range of peaks and alter the shape of the sweeping wave, so you can hone the sweep and produce sounds with a synth-like behaviour. Filter pedals are truly genre-bending and will help you to push your sound beyond the realms of convention.