The musicians will demonstrate the marvels of "Goldie," an 18-voice, three-keyboard Wurlitzer organ that includes a full set of percussion instruments and a grand piano that can be played from the organ console.
http://www.timesunion.com/local/article/Plan-ahead-1435728.p...

The instrument was originally designed as a 18-voice a two-manual (no pedal) organ, and was subsequently, in the year 1721, increased to three manuałs and pedal, and 40 baroque voices.
http://mypipeorganhobby.blogspot.com/2009_02_02_archive.html

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Note added at 18 mins (2011-06-27 10:43:56 GMT)
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"Organy w kosciele dominikanów w Lublinie"/"The organ of the Dominican church in Lublin"
The 20-voice organ was rebuilt in 1885, 1893, 1904, and 1973.
http://www.bcin.ca/Interface/openbcin.cgi?submit=submit&Chin...

You could, for instance, use one DSP chip to play back eight different monophonic parts such as snares and basses, and another for a single 16-voice organ or piano patch.
http://www.soundonsound.com/sos/sep03/articles/avindigotdm.h...

Using pipes from the former organ gave us the luxury of two independent Pedal stops making a total of five 16' stops in a 20-voice organ!
http://www.thediapason.com/dp/index.cfm?fuseaction=showArtic...