Mixed music is a term which describes music combining acoustic instruments and fixed-media electronics (e.g "concrete" sounds, sound-file playback etc) or more generally, music which combines acoustic-instrumental and electronic sounds sources (to the exclusion of electrically amplified instruments, such as the electric guitar and electronic instruments such as the theremin, electronic organs & keyboards, etc); mixed music is therefore a subcategory of electronic music.
 While this term could be applied to many genres, the term "mixed music" generally refers to contemporary classical music repertoire and is therefore distinct from live electronic music.
Cheetah is an extended play by British electronic musician Richard D. James, released under the pseudonym Aphex Twin on 8 July 2016 on Warp.
 The name is a reference to Cheetah Marketing, a British manufacturer of microcomputer peripherals and electronic musical instruments in the 1980s (such as the MS800 namechecked in two of the EP's track titles).
Annie Gosfield (born September 11, 1960 in Philadelphia) is a composer based in New York who works on the boundaries between notated and improvised music, electronic and acoustic sounds, refined timbres and noise.
 She composes for others and performs with her own group, taking her music on a path through festivals, factories, clubs, art spaces, and concert halls.
 Much of her work combines acoustic instruments with electronic sounds, incorporating unusual sources such as satellite sounds, machine sounds, detuned or out of tune samples and industrial noises.
 Her work often contains improvisation and frequently uses extended techniques and/or altered musical instruments.
 She won a 2012 Berlin Prize.
Electronic music is music that employs electronic musical instruments, digital instruments and circuitry-based music technology.
 An electronic musician is a musician who composes or performs such music.
 In general, a distinction can be made between sound produced using electromechanical means, such as violins and drums, and that produced using electronic technology.
 Electromechanical instruments include mechanical elements, such as strings, hammers, and so on, and electric elements, such as magnetic pickups, power amplifiers and loudspeakers. Examples of electromechanical sound producing devices include the telharmonium, Hammond organ, and the electric guitar, which are typically made loud enough for performers and audiences to hear with an instrument amplifier and speaker cabinet.
 Pure electronic instruments do not have vibrating strings, hammers, or other sound-producing mechanisms.
 Devices such as the theremin, sound synthesizer, and computer can produce electronic sounds.
Richard Lainhart (February 14, 1953 – December 30, 2011) was an American composer of electronic music that combines analog and digital instrumentation with extended performance techniques derived from traditional acoustic instruments.
 Lainhart's music is particularly associated with the renaissance of modular analog synthesis, and frequently performed with a Buchla 200e modular synthesizer controlled by a Haken Audio Continuum multidimensional keyboard controller.
Chris Brown (born 1953) is an American composer, pianist and electronic musician, who creates music for acoustic instruments with interactive electronics, for computer networks, and for improvising ensembles.
 He was active early in his career as an inventor and builder of electroacoustic instruments; he has also performed widely as an improvisor and pianist with groups as "Room" and the "Glenn Spearman Double Trio."
 In 1986 he co-founded the pioneering computer network music ensemble "The Hub".
 He is also known for his recorded performances of music by Henry Cowell, Luc Ferrari, and John Zorn.
 He has received commissions from the Berkeley Symphony, the Rova Saxophone Quartet, the Abel-Steinberg-Winant Trio, the Gerbode Foundation, the Phonos Foundation and the Creative Work Fund.
 His recent music includes the poly-rhythm installation "Talking Drum", the "Inventions" series for computers and interactive performers, and the radio performance "Transmissions" series, with composer Guillermo Galindo.
Drukqs (stylised as drukQs) is the fifth studio album by Aphex Twin, a pseudonym used by English electronic musician Richard D. James.
 The album is a double album and peaked at number 22 on the UK Albums Chart, selling 11,476 copies in its first week of release.
An effects unit or pedal is an electronic or digital device that alters how a musical instrument or other audio source sounds.
 In the 2010s, most effects use solid-state electronics and/or computer chips.
 Some vintage effects units from the 1930s to the 1970s and modern reissues of these effects use mechanical components as well (e.g., Leslie rotating speaker, spring reverb, and tape recorder-based echo effects) or vacuum tubes.
 Some effects subtly "color" a sound, such as a reverb unit used on a low setting, while others transform it dramatically, such as a distortion pedal used with electric guitar, with the overdrive set to its maximum level.
 Musicians, audio engineers and record producers use effects units during live performances or in the studio, typically with electric guitar, electronic keyboard, electric piano or electric bass.
 While guitar effects are most frequently used with electric or electronic instruments, effects can also be used with acoustic instruments, drums and vocals.
 Rackmounted or audio console-integrated reverb effects are commonly used with vocals in live sound and sound recording.
 Examples of common effects units include wah-wah pedals, fuzzboxes and reverb units.
Computer Controlled Acoustic Instruments pt2 is an extended play by the British electronic musician Richard D James.
 It was released under the pseudonym Aphex Twin on 23 January 2015 on Warp.
 It is meant as a companion piece to his fifth studio album, "Drukqs" (2001).
 It received mixed reviews and placed in several international record charts, including the United States "Billboard" Dance/Electronic Albums chart where it peaked at number one.
Stage monitor systems are speakers on stage pointing towards the performers to help them hear themselves.
 Monitor speakers are useful when amplified instruments are used with acoustic instruments and voice.
 Monitor speakers typically have their own power amplifier(s) and equalizers.
 They are driven by a separate mix from the main or front of house system.
 This mix typically highlights the vocals and acoustic instruments so they can be heard over the electronic instruments and drums.
 The collection of monitor speakers, amplifiers, equalizers and monitor mixer if used is called the stage monitor system or simply monitors.
 In Britain the term foldback or foldback speakers is often used.

Question: Which British electronic musician is known for his extended play Computer Controlled Acoustic Instruments pt2 and his album Drukqs?
Answer: Richard D James