and DM5 drum modules and Monitor One studio monitors. In 1997, Alesis Semiconductor was formed, again taking advantage of Barr's custom integrated circuits to produce and market chips for the audio industry. A series of chips were introduced that ranged from digital signal processors for audio effects to analog-to-digital and digital-to-analog converters. By 2001, however, the company's business suffered as market trends changed, and on April 27 of that year, Alesis filed for Chapter 11 bankruptcy. In the subsequent restructuring, Jack O'Donnell acquired the company. After 2001 Under O'Donnell's direction, Alesis expanded into new product categories such as mixers, portable PA speakers, and other recording equipment. At the same time, legacy Alesis products like the SR-16 drum machine continue to be produced and sold more than 20 years after their introduction. Today, Alesis continues expansion into new product categories in mobile music-making, recording, video, and live sound. Alesis founder Keith Barr died of an apparent heart attack on August 24, 2010, at age 60. In 2012 Alesis became part of the newly created inMusic Brands group of companies. Target market Alesis products are intended primarily for studio and live performance (rather than practice use) and are now targeted at professional and semi-professional musicians. Alesis is known for budget equipment but has produced high-end and innovative gear such as the Alesis Fusion, Andromeda A6 analog synthesizer, Ion virtual analog modeling synthesizer, as well as the Ion-based Micron. Alesis developed equipment for recording studios during the 1990s. Alesis models Quadrasynth & Quadrasynth Plus synthesizer keyboards Andromeda A6 polyphonic analog synthesizer Fusion 6HD, 8HD synthesizer workstation keyboard ION analog modeling synthesizer Recital, 61 & Pro stage pianos Virtue stage piano Concert stage piano Prestige & Prestige Artist stage pianos. See also List of studio monitor manufacturers References Further reading External links Alesis Company Website Jack O'Donnell – owner of Alesis and Numark, Pro-Music-News, 2001 Alesis SR18 Sound On Sound review (archive.org) Manufacturers of professional audio equipment Synthesizer manufacturing companies of the United States Drum machines Percussion instrument manufacturing companies Privately held companies based in Rhode Island Electronics companies established in 1984 Audio mixing console manufacturers Musical instrument manufacturing companies of the United States 1984 establishments in California Companies that filed for Chapter 11 bankruptcy in 2001 2012 mergers and acquisitions Audio equipment manufacturers of the United States