This engineering brief presents open-access 3D sound recordings of musical performances and room impulse responses made using various 3D microphone arrays simultaneously. The microphone arrays comprised OCT-3D, 2L-Cube, PCMA-3D, Decca Tree with height, Hamasaki Square with height, First-order and Higher-order Ambisonics microphone systems, providing more than 250 different front-rear-height combinations. The sound sources recorded were string quartet, piano trio, piano solo, organ, clarinet solo, vocal group and room impulse responses of a virtual ensemble with 13 source positions captured by all of the microphones. Future studies will use the recordings to formally elicit perceived attributes for 3D recording quality evaluation as well as for spatial audio ear training.
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