to ensure absolute sonic purity. Unlike standard musical releases, the instrumental and vocal tracks on this CD were recorded without any electronic processing

For those who value high-quality sound reproduction, this CD offers a chance to critically evaluate their home audio systems.

The story begins with the collaboration of two industry titans. Alan Parsons, known for his engineering work on iconic albums like Pink Floyd’s The Dark Side of the Moon , joined forces with Stephen Court to create a resource that addressed the real-world needs of studio engineers and audio technicians.

The CD was specifically engineered to help studio engineers, live sound technicians, and audiophiles analyze, calibrate, and troubleshoot sound systems. It famously contains 99 tracks divided into highly specific audio categories:

The CD serves as an "instant system response analyser" primarily through its inclusion of pink noise 1/3 octave spectrum analysis tracks (Tracks 1–32). These signals allow for precise measurement of frequency response in any environment when paired with appropriate metering. Technical segments include:

The disc is divided into technical tests and high-fidelity reference recordings: Technical Test Signals (Tracks 1–58): Pink Noise:

The "Sound Check 2 Audio Test and Demonstration CD" is a follow-up to Parsons' earlier release, "Sound Check," which was designed to provide a comprehensive audio testing and calibration tool for professionals. The second installment, released in 2003, aimed to build upon the first, incorporating new and improved audio tests, as well as demonstrations of cutting-edge audio technology. The CD's primary purpose is to serve as a reference tool for audio engineers, musicians, and producers to test and calibrate their audio equipment, ensuring optimal performance and sound quality.