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.

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

MediaCollege.com is a free resource site, suitable for anyone with an interest in audio-visual media. Tutorials and articles include everything from video production to website design.

DialABC.com home page

ComTekk Software - Tone generator for 2-way radio signaling. Use sound card to generate CTCSS, DTMF, tone remote, ANI and more.

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

YouTube is a place to discover, watch, upload and share videos.

Analog Devices, Analog, Semiconductors, Digital Signal Processing, World leader in high performance signal processing solutions. Offers ICs for data converters, amplifiers, DSP, RF & communications, power and thermal management, supervisory and i...

Texas Instruments (TI) is a global analog and digital semiconductor IC design and manufacturing company.

A community committed to sharing Perl knowledge and coding tips. The site contains questions and answers, useful snippets, and a library of code.

GAO Research Inc. is the world leading provider of embedded software and hardware solutions for modem, fax, speech, telephony, modem relay, fax relay, fax over IP, Voice over IP and Voice over DSL on various fixed and floating point DSPs and processo...

Radio Paging Controllers and Radios.

8255, PPI, parallel, digital, digital interface card, interface card, DIO, I/O, robot, robotics, computer, control, motor, motor control, parallel port, infrared, emitter, detector