Slate Digital is known for modeling real-world hardware EQs—but in their Custom Series Bundle, they take the process a bit further, emulating different hardware EQs on a per-band basis. Two modules are provided in this downloadable software: the Custom Series EQ and the Custom Series Lift. These plug-ins are suitable for use on vocals, kick drums, basses, guitars, or anything else you'd need to mix in a track.

Use the Custom Series EQ for its high-pass filtering, low-pass filtering, parametric midrange bands, and bass/treble shelving. Use the Custom Series Lift, that operates in parallel, to boost only your low- and high-end frequencies without clouding up the mix, giving you a subtle EQ lift. Together, these processors provide a musical way of treating your instruments.