HEATKEYS

Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

Cockos Confederated Forums

recording, studio, microphone, mic pre, compressor, equalizer, pro tools, DAW, Nuendo, Cubase, SSL, Neve, Helios, review, reviews

Professional Audio Monitoring Systems

Head-Fi.org: Head-Fi covers headphones, portable audio, earphones, earbuds, headphone amplifiers and audiophile equipment.

A community dedicated to helping everyone learn the art of audio. Projects by fanatics, for fanatics!

Astronomical computations and mathematical functions source programs in C. Home page of the Cephes Mathematical Library.

Home page for David Drysdale

Dreamviews is the largest Lucid Dreaming Community and Resource on the web. All about lucid dreaming, controlling dreams, sleep stages, dream signs, dream interpretation and more.

A High-Quality Web-based Audio Frequency Signal Generator. 96kHz Sample Rate. Generate sine waves, sweep tones, noises and other sound test waveforms, online!

Thousands of people from around the world use SimplyNoise to block distractions, enhance privacy, aid sleep, mask Tinnitus, and melt away stress. The benefits of color noise have been utilized in clinics, schools, households, and offices.