Total Musicians: 2374
| Musician | Instrument |
| Michael | |
| Juhani Aaltonen | tenor saxophone |
| David Aaron | tenor saxophone |
| Eivind Aarset | guitar |
| Rez Abassi | guitar, sitar-guitar, |
| Mike Abbott | guitar |
| Tom Abbs | bass, tuba, |
| Susanne Abbuehl | vocals |
| Ahmed Abdullah | trumpet |
| John Abercrombie | guitar |
| Lennart Aberg | alto flute, soprano saxophone, tenor saxophone, |
| Rabih Abou-Khalil | oud |
| Petra Ackermann | viola |
| Bruce Ackley | soprano saxophone, tenor saxophone, |
| Terry Adams | piano |
| Steve Adams | alto flute, alto saxophone, baritone saxophone, bass clarinet, bass flute, clarinet, flute, sopranino saxophone, soprano saxophone, synthesizer, tenor saxophone, |
| Michael Adkins | tenor saxophone |
| Stan Adler | cello |
| Irene Aebi | cello, violin, vocals, |
| Lefteris Ahgouridakis | percussion |
| Kyle Aho | piano |
| Oskar Aichinger | piano, synthesizer, |
| Noel Akchote | guitar |
| Pheeroan AkLaff | drums |
| Frederic Alarie | bass |
| Howard Alden | guitar |
| Mats Aleklint | bass trombone |
| Ralph Alessi | trumpet |
| Aaron Alexander | drums, percussion, |
| Yannis Alexandris | guitar, oud, tamboura, |
| Rashied Ali | drums |
| Don Alias | percussion |
| Don Aliquo | tenor saxophone |
| Geri Allen | piano |
| Dave Allen | guitar |
| Brian Allen | trombone |
| Jeremy Allen | bass |
| Edward E.J. Allen | trumpet |
| Marshall Allen | alto saxophone, flute, oboe, |
| Ben Allison | bass |
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