FabFilter Mixing Bundle (Download)FabFilter's Mixing Bundle gets you FabFilter's effect plug ins that are a must have for every mixing engineer: the professional EQ, reverb, compressor, de esser and gate expander, and FabFilter's inspiring and creative distortion saturation and delay plug ins. This Mixing Bundle includes the following FabFilter Plug Ins: FabFilter Pro Q 4 An equalizer is probably the tool you use most while mixing and mastering, so you need the best of the best.