When discussing achieving "extra quality" in music production, it's essential to consider the role of precision and control. The "+221" in the query might symbolize a pursuit of precision or high standards (with 221 possibly being a placeholder or specific reference to a setting, frequency, or standard). The term "air" often refers to adding a sense of space or high-end clarity to audio tracks, a critical aspect of mixing and mastering.

The pursuit of "extra quality" in music production is relentless, with producers continually seeking new ways to enhance their sound. Whether through the use of high-quality virtual instruments like Nexus, precise control with plugins (Refx), or ensuring secure and easy access to software with an Elicenser, each element plays a role in the production process.

Refx, likely referring to Refx plugins or products (assuming a typographical error in the query), could imply a variety of audio processing tools. Without a specific product line named Refx, it's reasonable to consider that this refers to any number of audio effects or instrument plugins used in digital audio workstations (DAWs). These plugins are often used to enhance, manipulate, or generate audio signals.

The integration of Refx plugins (or similar), Nexus for its sonic capabilities, and the use of an Elicenser for secure software access, represents a workflow designed for quality. Producers and engineers can leverage these tools to push their productions to the next level, ensuring that the final output is polished and engaging.