E- Sonarworks HP to SoundID HP UPG is a digital upgrade license that transitions users from previous Sonarworks headphone calibration tools to the latest SoundID Reference platform. It enhances headphone-based mixing accuracy by delivering a more refined, neutral, and consistent reference sound for production, mixing, and mastering.Designed for producers, engineers, DJs, and audio professionals, this upgrade ensures your existing supported headphones continue to perform with improved calibration accuracy and expanded workflow tools. It enables a more reliable mix translation across different playback systems such as phones, laptops, studio monitors, and consumer devices.Key Features Upgrade path to SoundID Reference for an improved headphone calibration system High-precision headphone calibration for neutral, studio-grade reference sound Supports 500+ headphone models with detailed calibration profiles Improves mix translation across all playback systems (phones, laptops, speakers, earbuds) Works as a DAW plugin and a systemwide audio calibration tool Custom target curve control for personalized or professional tuning Low-latency and linear-phase processing modes for flexible production use Seamless integration into the existing Sonarworks calibration workflow