| 20th Century Fox Studio Chorus |
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| 20th Century Fox Studio Orchestra |
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| 20th-Century Classics Ensemble |
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| Aalborg Symphony Orchestra |
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| Abbado, Claudio |
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| Abbey, Frank |
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| Abercrombie, Michael |
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| Abeshouse, Adam |
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| Ablinger-Sperrhacke, Wolfgang |
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| Abort, Marc J. |
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| Abramenkov, Andrei |
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| Abravanel, Maurice |
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| Absolut Trio |
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| Absolute Ensemble |
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| Academy of Saint Martin-in-the-Fields |
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| Acevedo, Felix |
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| Achen, Eric |
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| Achron, Joseph |
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| Ackermann, Manfred |
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| Ackermann, Petra |
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