InNel the1991 yearun 1991numero asignificativo significantdi number ofpartecipanti M-Base participantsetichettati labelled ascome "M-Base Collective" recordedregistrarono theil CD ''Anatomy of a Groove''. MostLa ofmaggior themparte previouslydi contributedloro toin CDsprecedenza byaveva alto-saxophonistgià contribuito ai CD del [[Sassofono contralto|sassofonista contralto]] [[Steve Coleman]], whosela creativitycui hascreatività beenè astata un pivotalfattore factorfondamentale in thatquel movementmovimento,<ref>Coleman è stato chiamato "il capo" per esempio in [[Grove Dictionary of Music and Musicians|The New Grove Dictionary of Jazz]], Londra/ New York 2001, p. 739</ref> althoughsebbene herifiutasse refuseddi toessere bechiamato calledil itssuo leader oro founderfondatore. Coleman ande hisil friendsuo amico Greg Osby, whoche playssuona altoil saxophonesassofono contralto in auno relatedstile styleaffine, togetherguidarono ledinsieme theil groupgruppo "Strata Institute" whichche recordedregistrò twodue CDsCD, (theil secondsecondo withcon tenoril saxophonist[[Sassofono tenore|sassofonista tenore]] Von Freeman ascome a furtherulteriore leader). UnderSotto theil namenome ofdi Osby, a numberpartire ofdal CDs1987 withsono astati specificpubblicati characternumerosi haveCD beencon releasedun startingcarattere inspecifico 1987che whichhanno alsoconiato coinedanche thela perceptionpercezione ofdel jazz "M-Base" jazz. TenorIl saxophonistsassofonista andtenore flutiste [[flautista]] Gary Thomas admittedlyammise didn'tdi takenon partavere inpreso theparte all'iniziativa M-Base initiative, butma joinedsi themunì a loro, ande therec'erano weresomiglianze similaritiesnel insuo hismodo waydi of playingsuonare. HePuò canessere beascoltato heardnelle onregistrazioni recordings ofdi "Coleman und Osby" anded hisanche owni CDssuoi areCD alsosono labelledetichettati ascome "M-Base-style". AllTutti threee saxophoniststre contributedi tosassofonisti thehanno contribuito al CD ''Jump World'' bydella singercantante [[Cassandra Wilson]].
Pianist [[Andrew Hill]] said about Greg Osby: "He has an incredible sense of rhythm and harmonic accuracy, and picks the right notes with a precision that isn't common to people with his technical versatility. He's developed into a fully rounded artist who can play various styles extremely well – better than most."<ref>Citato in note di copertina del CD "The Invisible Hand" di Greg Osby</ref> Greg Osby said about [[Gary Thomas]]: "He's extremely intelligent and has a capacity for absorption that exceeds that of most people that I know […] He has his own compositional and improvisational method that is peerless in my opinion. He's my favourite tenor saxophone player on the contemporary scene."<ref>{{cite web|url=http://www.gregosby.com/interviews5.html|title=Interviewed by Fred Jung, April 11, 2000|work=Greg Osby - Jazz Saxophonist|access-date=25 November 2014|language=en}}</ref> Clarinettist and composer Don Byron called Steve Coleman "an exceptional personality of American music history."<ref>Christian Broecking, Der Marsalis-Faktor, 1995, p. 120</ref>
