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.

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

Delphi, the modern Pascal descendent, is introduced as a "learn by example" tool to solve math and science puzzles and problems

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

Sound Devices, LLC: Manufacturer of portable analog and digital audio products for radio, television, film, and music recording.

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Federal Signal, Electrical Products, Industrial Safety and Security, supplies Audible Signals, Visual Signals and Voice Communication for Life Safety, Process Control, and Wide Area Communication Systems.

FlexiMusic creates audio and music software. Wave Editor for audio editing, Composer for composing music, Kids Composer for kids, Generator to create unique sounds and Orchestra for keyboard playing

Edwards Signaling manufacturers a complete line of audible and visual signals for industrial and commercial applications. Products include: fire alarm control panels, flashing and steady LED and halogen beacons and lights, strobes, vibrating horns an...