Viscount promotes their Physis physical modeling technology as capable of “generating the highest-fidelity, most authentic church organ sound”. An inspection of the Viscount audio system makes this claim suspect.
Consider the Viscount Unico 800, a four-manual, 84-stop instrument. However, its audio system does not measure up to its large size with a standard audio compliment only including an internal 7-channel system. The internal audio systems for the various Unico models are published by Viscount and included in the drawing below.
The 7-channel Unico 800 audio system consists of one 12” subwoofer channel, with the remaining 6 channels consisting of only a 4” mid-range and 1” or 2” tweeter. Putting this into context, the smallest three-manual Allen Organ with half the number of stops of the Viscount 800 includes a significantly more robust internal audio system with 1 x 15” woofer, 4 x 8” midrange, and 4 x 3” tweeters.
Regardless of an organ’s tone generation system, without a high-fidelity audio system the tonal results will be less than pleasing. Viscount’s small audio system not only limits an organ’s tonal fidelity, but may indicate a tone generation system not capable of producing high-fidelity sounds.
A digital organ’s tonal quality is limited by weakness in any part of its sound production including the audio system.