This report describes the production of several immersive musical sound scenes for a 9+10+8 (27.2) 3D audio reproduction system. 9+10+8 features an even spatial distribution of loudspeaker channels in three vertical layers: top (above the listener), main (ear-level), and bottom (below the listener). 3D sound recording and mixing methodologies are discussed with reference to four specific sound scenes: solo jazz piano, large pipe organ in a concert hall, alternative rock, and a taiko drum ensemble, as well as in more general terms. This report aims to help fill a current gap in published knowledge surrounding music production techniques for 3D audio systems featuring bottom-layer reproduction channels, such as NHK 22.2, Sony 360 Reality Audio, and various binaural audio production and rendering mediums.
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