Based on results from previous research, as well as a new series of experimental recordings, a technique for three-dimensional orchestral music recording is introduced. This technique has been optimized for 22.2 Multichannel Sound, a playback format ideal for orchestral music reproduction. A novel component of the recording technique is the use of dedicated microphones for the bottom channels, which vertically extend and anchor the sonic image of the orchestra. Within the context of highly dynamic orchestral music, an ABX listening test confirmed that subjects could successfully differentiate between playback conditions with and without bottom channels.
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