SRT, Inc.,
doing business as
A trade name, trading name, or business name is a pseudonym used by companies that do not operate under their registered company name. The term for this type of alternative name is fictitious business name. Registering the fictitious name with ...
Covox, Inc., was a small, privately owned
American technology company active from 1975 to 1994. The company released a number of sound-generating devices for
microcomputer
A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (P ...
s and
personal computer
A personal computer, commonly referred to as PC or computer, is a computer designed for individual use. It is typically used for tasks such as Word processor, word processing, web browser, internet browsing, email, multimedia playback, and PC ...
s from the 1980s to the 1990s. They are perhaps best known for the
Speech Thing, a
digital-to-analog converter
In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital converter (ADC) performs the reverse function.
DACs are commonly used in musi ...
that plugs into a parallel port of the
IBM Personal Computer
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible ''de facto'' standard. Released on August 12, 1981, it was created by a ...
. Covox was originally based in Southern California but moved their headquarters to
Eugene, Oregon
Eugene ( ) is a city in and the county seat of Lane County, Oregon, United States. It is located at the southern end of the Willamette Valley, near the confluence of the McKenzie River (Oregon), McKenzie and Willamette River, Willamette rivers, ...
, in the early 1980s.
History
SRT, Inc., was founded by Larry Stewart in Southern California in 1975. Stewart had previously worked in the aerospace industry into the 1960s, where he got the idea for Av-Alarm, a sound-generating device intended to scare off birds from outside locations such as vegetable crops and vineyards.
SRT relocated to
Eugene, Oregon
Eugene ( ) is a city in and the county seat of Lane County, Oregon, United States. It is located at the southern end of the Willamette Valley, near the confluence of the McKenzie River (Oregon), McKenzie and Willamette River, Willamette rivers, ...
, in 1982, Stewart finding Oregon to be a cheaper state in which to conduct his business. Around this time, he hired his sons Mike Stewart and Brad Stewart to manage the company.
Together they established Covox, Inc., a subsidiary of SRT, in 1982; this subsidiary was dedicated to audio products for
microcomputer
A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (P ...
s and
personal computer
A personal computer, commonly referred to as PC or computer, is a computer designed for individual use. It is typically used for tasks such as Word processor, word processing, web browser, internet browsing, email, multimedia playback, and PC ...
s and soon after subsumed the SRT name.
Brad Stewart, named the company's vice president, was responsible for the development all of Covox's products.
Covox's first product was released in 1984; called the Voice Master, it was a low-cost
speech-synthesis board for the
Commodore 64
The Commodore 64, also known as the C64, is an 8-bit computing, 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, January 7–10, 1982, in Las Vegas). It has been listed in ...
, intended for business and education.
A successor to this device, the Voice Master II, was released in 1990.
By mid-1987, sales of Covox products represented 85 percent of SRT's total sales.

In late 1987, Covox released the
Speech Thing, a simple
digital-to-analog converter
In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital converter (ADC) performs the reverse function.
DACs are commonly used in musi ...
that plugs into a parallel port of the
IBM Personal Computer
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible ''de facto'' standard. Released on August 12, 1981, it was created by a ...
(and
compatibles). It was the first sound device for the IBM PC capable of playing digital audio samples. The Speech Thing initially sold poorly but later found widespread adoption among video game developers and multimedia software authors.
Disney Interactive
Disney Interactive is an American video game and internet company that oversees various websites and interactive media owned by The Walt Disney Company.
History 1995–1996: Formation and beginnings
In December 1994, Disney announced that it w ...
later licensed the technology behind the Speech Thing for their own peripheral, the
Disney Sound Source.
In 1989, Covox released the Sound Master, a full-fledged
sound card
A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
based on
General Instrument
General Instrument (GI) was an American electronics manufacturer based in Horsham, Pennsylvania, specializing in semiconductors and cable television equipment. They formed in New York City in 1923 as an electronics manufacturer. During the 1950s ...
's
AY-3-8910 programmable sound generator
A programmable sound generator (PSG) is a sound chip that generates (or synthesizes) audio wave signals built from one or more basic waveforms, and often some kind of noise. PSGs use a relatively simple method of creating sound compared to other m ...
. It was capable of producing three-voice polyphonic music, unlike the Speech Thing, as well as digital sound effects. The Sound Master sold poorly and lacked the widespread support from software developers that the Speech Thing enjoyed, however.
They followed up the Sound Master with the Voice Master Key, a voice recognition suite for IBM PCs and compatibles comprising a specialized sound card, speakers, a microphone, and software.
Between May and September 1989, Covox leased a 17,000-square-foot airplane hangar at the
Pearson Airpark in
Vancouver, Washington
Vancouver ( ) is a city on the north bank of the Columbia River in the U.S. state of Washington (state), Washington, located in Clark County, Washington, Clark County. Founded in 1825 and incorporated in 1857, Vancouver had a population of 190, ...
, in order to raise more manufacturing lines beyond their Eugene offices.
By 1992, the company employed 23 people, generated $3 million in annual revenue, and had opened an international subsidiary, with a regional office in
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
.
Founder Larry Stewart had retired to Vancouver, Washington, by 1992, leaving his sons as the sole owners of the company.
The Stewart family found themselves strapped for cash to expand Covox, but in late 1992 they found an investment company, Sound Trends, Inc., who were willing to invest capital in the company in exchange for a 60-percent controlling interest in Covox. Larry Stewart later alleged that Sound Trends had spent the company's money frivolously, citing a failed advertising campaign costing upwards of $250,000 as an example of this.
Covox's last two years were plagued with lawsuits. In September 1993,
Creative Technology
Creative Technology Ltd., or Creative Labs Pte Ltd., is a Singaporean multinational electronics company mainly dealing with Audio equipment, audio technologies and products such as speakers, headphones, sound cards and other digital media. Foun ...
sued Covox for alleged trademark infringement of their
Sound Blaster
Sound Blaster is a family of sound cards and audio peripherals designed by Creative Technology, Creative Technology/Creative Labs of Singapore. The first Sound Blaster card was introduced in 1989.
Sound Blaster sound cards were the de facto stan ...
line with Covox's Voice Blaster voice-synthesis software.
Creative won a settlement against Covox in January 1994.
A bevy of Covox's creditors followed suit with lawsuits of their own, including Interactive Products, who co-developed Covox's software; Box Maker and Admiral Printing, who printed and assembled Covox's product boxes and brochures; CMP Publications, who ran advertisements for Covox's products; and more.
Amid massive debt to creditors, Covox laid off all remaining 25 employees in July 1994 and exited their Eugene headquarters from which they were evicted.
Covox promised to open their doors again after their financial situation was sorted out; however, a revival never came to fruition.
References
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1975 establishments in California
1982 disestablishments in California
1982 establishments in Oregon
1994 disestablishments in Oregon
American companies established in 1975
American companies disestablished in 1994
Computer companies established in 1975
Computer companies disestablished in 1994
Defunct computer companies of the United States
Defunct computer hardware companies
Digital audio