Some context: Orchestral Manoeuvres in the Dark (OMD) are an English electronic music band formed in Wirral, Merseyside in 1978. Spawned by earlier group The Id, the outfit is composed of co-founders Andy McCluskey (vocals, bass guitar) and Paul Humphreys (keyboards, vocals), along with Martin Cooper (various instruments) and Stuart Kershaw (drums); McCluskey is the only constant member. OMD released their debut single, "Electricity", in 1979, and gained popularity throughout Europe with the 1980 anti-war song "Enola Gay".
Founders Andy McCluskey and Paul Humphreys met at primary school in Meols in the early 1960s, and in the mid-1970s, as teenagers, they were involved in different local groups but shared a distaste for guitar driven rock with a macho attitude popular among their friends at the time.  By 1975 McCluskey had formed Equinox, as bassist and vocalist, alongside schoolmate Malcolm Holmes on drums, while Humphreys was their roadie. During that time McCluskey and Humphreys discovered their electronic style influenced by Kraftwerk. After Equinox, McCluskey joined Pegasus, and, later, the short-lived Hitlerz Underpantz, alongside Humphreys. McCluskey would usually sing and play bass guitar; roadie and electronics enthusiast Humphreys graduated to keyboards. The pair shared a love of electronic music, particularly Brian Eno and Kraftwerk.  In September 1977, McCluskey and Humphreys put together the seven-piece (three singers, two guitarists, bassist, drummer, and keyboard player) Wirral group The Id, whose line-up included drummer Malcolm Holmes and McCluskey's girlfriend Julia Kneale on vocals. The group began to gig regularly in the Merseyside area, performing original material (largely written by McCluskey and Humphreys). They had quite a following on the scene, and one of their tracks ("Julia's Song") was included on a compilation record of local bands called Street to Street. Meanwhile, Humphreys and McCluskey collaborated on a side-project called VCL XI (named after a misreading of a valve from the diagram on the back cover of Kraftwerk's Radio-Activity album; the name of valve is actually written with Arabic numbers, VCL 11, and not Roman numerals). This side-project allowed them to pursue their more bizarre electronic experiments, often working with tape collages, home-made kit-built synthesisers, and circuit-bent radios.  In August 1978, The Id split due to musical differences. The same month, McCluskey joined Wirral electronic outfit Dalek I Love You as their lead singer, but quit in September.
Did they play music together then?
A: By 1975 McCluskey had formed Equinox,
Some context: Rudolph Van Gelder (November 2, 1924 - August 25, 2016) was an American recording engineer who specialized in jazz. Regarded as the most important recording engineer of jazz by some observers, Van Gelder recorded several thousand jazz sessions, including many recognized as classics, in a career which spanned more than half a century. Van Gelder recorded many of the great names in the genre, including John Coltrane, Miles Davis, Thelonious Monk, Sonny Rollins, Art Blakey, Joe Henderson, Freddie Hubbard, Wayne Shorter, and Horace Silver, among many others. He worked with many record companies but was most closely associated with Blue Note Records.
In 1967, Alfred Lion retired from running Blue Note, and the company's owners, Liberty Records (from 1965), began to use other engineers more regularly. Prestige, too, had started to use other studios a few years earlier. Van Gelder remained active in music recording, working as the engineer for most of Creed Taylor's CTI Records releases, a series of proto-smooth jazz albums that were financially successful, but not always well received by critics.  Though his output slowed, Van Gelder remained active as a recording engineer into the new century. In the late 1990s he worked as a recording engineer for some of the songs featured on the soundtrack to the TV Show Cowboy Bebop. From 1999, he remastered the analog Blue Note recordings he made several decades earlier into 24-bit digital recordings in its RVG Edition series and also a similar series of remasters of some of the Prestige albums he recorded for its current owners, Concord Records. He was positive about the switch from analog to digital technology. He told Audio magazine in 1995:  The biggest distorter is the LP itself. I've made thousands of LP masters. I used to make 17 a day, with two lathes going simultaneously, and I'm glad to see the LP go. As far as I'm concerned, good riddance. It was a constant battle to try to make that music sound the way it should. It was never any good. And if people don't like what they hear in digital, they should blame the engineer who did it. Blame the mastering house. Blame the mixing engineer. That's why some digital recordings sound terrible, and I'm not denying that they do, but don't blame the medium.  Van Gelder resided in Englewood Cliffs into this century. He died at his Engelwood Cliffs home on August 25, 2016.
What are his notable achievements in his later career?
A:
From 1999, he remastered the analog Blue Note recordings he made several decades earlier into 24-bit digital recordings in its RVG Edition series