A twelve-track console and a modular idea.

API — Automated Processes, Inc. — dates itself to 1969, when, its website says, the company “was formed by engineers and musicians.” The story starts two years earlier. A biography of Saul Walker published by New York University says he designed the first 12-track recording console, in 1967, for the Apostolic studio in New York, used by Frank Zappa, and that “the popular response to this project led to the founding” of API, where Walker was vice-president of engineering. English Wikipedia names Lou Lindauer as Walker’s co-founder. The start date is not settled: the console dealer Dan Alexander, relaying the account of later owner Paul Wolff, wrote that Walker started API “circa 1966/67 with about 15 employees.”

The company’s timeline credits Walker with the 2520 discrete op-amp in 1968 and with the modular design of the 500 Series in 1969: interchangeable modules — preamps, equalisers, compressors — that could be combined into a console. Wolff told Alexander the 2520 was a reworking of a design from Melcor, the company several early API engineers came from; we give both accounts. API says its first commercial console was shown at the Audio Engineering Society convention in the autumn of 1969 and sold to Sound Ideas in New York, that Les Paul bought one of the first modular consoles in 1970, and that the 550A equaliser joined the range in 1971.

The company makes other claims to firsts — conductive-plastic faders, early console automation and the voltage-controlled amplifier among them — which we give as its own claims. The NYU biography lists clients including ABC, NBC, CBS, the BBC, the Hit Factory, Sunset Sound and the White House.

Closure, a licence, a buyer and a group.

The first API did not last. According to Alexander, when it “closed its doors in 1978” it had 130 full-time staff and had built more than 700 consoles; the largest, a 48-input desk, went to Mickie Most’s RAK Studios in London. That year Datatronix licensed the rights to API and built the 550A-1, and most of the original engineers went to the console maker Sound Workshop, Alexander wrote. Walker himself moved on to Mitsubishi’s pro audio group in 1985 and later to Otari, the NYU biography says.

In 1985 Paul Wolff, a Datatronix employee, bought the company. That year, according to the TEC Awards, Wolff introduced the Lunchbox, a lunchbox-sized case for up to four API modules, which let studios use 500-series modules without an API console; the TEC Awards’ TECnology Hall of Fame inducted it in 2017. API’s timeline says the first full Legacy console was installed at Greene Street Recording in New York in 1992, and the Legacy Plus followed in 1997.

The current owner arrived at the end of the decade. Audio Toys, Inc. (ATI), a Jessup, Maryland, maker of live-sound consoles founded in 1988, bought API — in 1998, according to The Baltimore Sun in 2003, or 1999, according to API’s own timeline and to Alexander. ATI’s president and co-founder Larry Droppa is still API’s president; in a letter on the company’s website he writes that he acquired API “over 20 years ago” and calls himself “but the caretaker of an awesome brand.” In 2003 The Baltimore Sun described the business as having 28 employees and selling studio consoles at $200,000 to $500,000.

Consoles, modules and the studio trade.

The seven makers in this guide build recording-studio equipment, from large mixing consoles to desktop interfaces.

Solid State Logic, founded by Colin Sanders in 1969, says its headquarters has been at Begbroke Manor, near Oxford, since 1986; it was bought in 2017 by Audiotonix, a British console group that says it agreed new investment from PAI Partners in 2024, with Ardian and Astorg keeping minority stakes. AMS Neve, formed by Siemens in 1992 from Neve Electronics and Advanced Music Systems, says it has been privately owned since 1996 and makes its products in Burnley, Lancashire.

In the United States, API, formed in 1969, is in Jessup, Maryland, and is owned by its president, Larry Droppa, according to English Wikipedia. Rupert Neve Designs, founded in 2005 by Rupert Neve, Evelyn Neve and Josh Thomas, is in Wimberley, Texas; MOTU says it is based in Cambridge, Massachusetts. Apogee Electronics was acquired in November 2025 by Rockforce Tech Holding Inc., the parent of Manley Labs, and says it will stay in Santa Monica.

Behringer, founded by Uli Behringer in 1989, is part of his Music Tribe group, and its own timeline marks 25 years of production in China; English Wikipedia places its Music Tribe City factory in Zhongshan, Guangdong.

Rupert Neve Designs says its products are designed, manufactured and tested in the USA. Solid State Logic, API, MOTU and Apogee do not say, on the pages we checked, where their current products are made, and we have not guessed.

This guide sets out what can be checked about each brand — who founded it, who owns it, and what it says about where its products are made — and marks clearly what rests only on the company’s own word.

A format that outgrew its maker.

Under ATI, API rebuilt its range. Its timeline lists the 2500 stereo bus compressor in 2000, using a circuit adapted from ATI designs; large-format Vision consoles in 2003; the 1608 in 2008, an update of the 1970s 1604; THE BOX, its smallest console, in 2013; the Legacy AXS in 2016; and the 2448 and 1608-II in 2018. In 2011 it licensed its designs for software plug-ins from Waves and Universal Audio, the company says.

The 500 Series became a format that other companies use. As demand for the modules rose, API says it set up the VPR Alliance in 2006 to encourage other makers to build compatible modules; English Wikipedia, citing Sound On Sound, says the specification fixed voltage, current draw, dimensions and connector pins. API also protects its look: its timeline says it trademarked the shape of its control knob in 2008, and that the Lunchbox name was registered as a trademark in 2010. For the 1976 bicentennial, it says, one console was built with red, white and blue knobs.

Recognition followed the anniversaries. API marked 50 years in 2019 with a party at Sony Music Hall in New York and limited 550A, 312, 2500 and 862 modules with gold faceplates; the 550A anniversary module and the 2448 console won TEC Awards, the company says, and the Recording Academy gave Saul Walker a Technical Grammy in 2019. On manufacturing, API describes its products as “handmade in Maryland, USA,” and says its newer API Select range — which, it says, revives the sounds of APSI, ATI and other brands — is “designed, assembled, and tested at API’s Maryland headquarters”; we give those as its claims.

For a design guide, API shows how a module format can carry a brand further than its consoles. Compare Solid State Logic, its British console rival, and Warm Audio, which makes 500-series modules among other gear. For this guide we use a faceplate blue, black, a bicentennial red and brushed silver with a condensed sans, an unofficial interpretation; no product or logo is reproduced.

Keep API’s identity on hand — save it to a board in the Made Good inspiration library.