The Waves C4 gives mixing and mastering engineers surgical control over dynamics across the frequency spectrum, eliminating the compromises of full-bandwidth processing. Each of the four bands operates as an independent dynamics processor, allowing you to apply aggressive limiting to low-end rumble while gently compressing midrange vocals and expanding upper frequencies for air—all without side effects on adjacent bands. This approach is essential for dense mixes where broadband compression causes pumping, or for broadcast and post-production environments where material from multiple sources requires frequency-specific treatment.

Beyond traditional multiband compression, the plugin integrates dynamic EQ functionality so gain changes occur only when signal crosses your threshold, preserving tonal balance during quiet passages. Auto-Release Control adapts to program material in real time, while manual release settings suit engineers who need repeatable, predictable behavior. The Range control prevents over-processing by capping maximum gain reduction or boost, maintaining musicality even under extreme settings. Whether you're sculpting final masters, controlling sibilance without affecting body, or tightening kick and bass relationships in a live mix recording, the C4 bridges the gap between static equalization and full dynamics processing in one efficient tool.