Pipe organ physical model with 84 pipes and 8 couplers. Fully polyphonic.
This is a waveguide-based physical model of a pipe organ that has one flute rank comprised of 84 pipes and 8 couplers. Each pipe is a separate voice with a fixed pitch, and the couplers direct the keys to the proper pipes. It is fully polyphonic; if you hold down all 61 keys when all of the couplers are on, all of the pipes will sound.
It’s packaged in this ensemble with the Space Master 2 reverb.
The controls are simple: the instrument can be tuned, the incoming air can be modified, the couplers can be turned on and off, and the pipes can be positioned in the stereo field.
The pipes are tuned for use with a 96 kHz sample rate, and consume considerable CPU resources. But I consider it necessary, because the tone of the higher-pitched pipes suffers at 44.1 kHz.
Some snapshots are provided which demonstrate various coupler combinations and air pressures.
The graphic control elements were created by Vera Kinter, URL http://www.artvera-music.com.
This is meant to supersede the pmPipeOrgan ensemble I published in 2005. I was never happy with the phase cancellation that occurred in that instrument when two or more instances of the same-sized pipe were played. So I decided to attempt to model a 7-octave rank of pipes, and to create a coupler system to trigger them. I was pleasantly surprised to find out that Reaktor could actually support 84 simultaneous pipes on my computer. Kudos to Reaktor’s low-CPU event-processing system.