Church Organ Reverb This example illustrates how The FIReverb Suite™ has been used to add reverberation to a close recorded church organ:

The channels used were: hauptv, haupth, pedalv and pedalh.

A model of the actual church was made in PureVerband four sources were placed accoring to the microphone positions, see details below.

If anyone with special interst in organ playing and tuning have questions about details, please send an e-mail to     and it will be forwared to the organist. A link to the GOArt page with background to this special church and organ is

The piece played is from Praeludium in G by Franz Tunder (1614-1667). A stereo CD recording made at the church with the same Franz Tunder material  is: "Franz Tuder: Organ Works" organist Pamela Ruiter-Feenstra, LRCD 1048/49 (LOFT RECORDINGS). This recording does not use the same microphone locations as the simulation (most likely a lot closer), and is of course from the real church, but it is still an interesting comparison.

A direct mono mix of four channels recorded at close positions right up at the organ at +/-3.5 and +/-2 m from the center. You hear some of the real church reverb but it is quite weak.
Mono mix
2.8 MB 

Recording enhanced by The FIReverb Suite™ : A model was made in PureVerb that had the same main dimensions and reverberation times (3.8 sec at mid frequencies) as the actual church four virtual sources were placed like this:

-3.5    -2    +2    +3.5
  L1    L2    R2     R1

5-channel mic

where each source used the corresponding recorded channel. At the receiver position a virtual 5-channel surround mic array was placed (a Williams MMA design) 16 m away (the church LxWxH is 40x20x12 m3) and for the sample here only the L and R mics were used (+/- 40° cardioids quite far apart +/-0.5 m). In MultiVolver a 4x2 convolution downmix for stereo was used, and also a 4x5 for the full surround (available on request).
4x2 Stereo
with reverb
2.9 MB