Johann Nepomuk Holzhey (1741-1809) was one of the great master organ builders of South Germany in the second half of the 18th century. In recent years Holzhey has received increasing attention. His instruments have been restored in the last three decades so that his relevance with regard to South German organ building has become visible again. He succeeded in developing a distinct personal style.

"His organs are part of the Rococo and Classical era but in his final creations the influence of Romantic sound aesthetics can be felt with increasing intensity. He is a contemporary of Haydn and Mozart. In Holzhey the classical organ attains its zenith." (Dr. Ulrich Höflacher)

Further information about Holzhey and the Weissenau organ can be found [here].


I Hauptwerk (C-f3/c4*)  
Prestant (C*/c-f3/c4*) 16'  
Principael 8'  
Copel 8'  
Quintadena 8'  
Gamba 8'  
Viola (Schwebung) 8'  
Octav 4'  
Flöten 4'  
Nazard 2f. 2'  
Superoctav 2'  
Sexqualter 3-4f. 3'  
Mixtur 6f. 2'  
Cornet 3f. (g-f3/c4*) 3'  
Trompet 8'  
Clairon 4'  
II Positiv (C-f3/c4*)  
Principal 8'  
Rohrflöten 8'  
Salicional 8'  
Unda Maris (Schwebung) 8'  
Flautravers (g-f3/c4*) 8'  
Octav 4'  
Holflöten 4'  
Fugari 4'  
Quint 3'  
Syflöt*1 2'  
Hörnle 2'  
Cimbal 5f. 2'+1 3/5'  
Fagott (C-b) 8'  
Hautbois (c'-f3/c4*) 8'  
III Echo (C-f3/c4*)  
Nachthorn 8'  
Dulciana 8'  
Spitzflöten 4'  
Flageolet 2'  
Cornet Resit 4f. 4'  
Vox Humana Bass (C-b) 8'  
Vox Humana Diskant (c'-f3/c4*) 8'  
Cromorne (C-b) 8'  
Schalmei (c'-f3/c4*) 8'  
Tremulant (Diskant)    
P Pedal (C-d'/f'*)
Subbaß 16'  
Octavbaß 8'  
Violonbaß 8'  
Cornetbaß 4'  
Bompard 16'  
Trompet 8'  
Clairon 4'  
Echo-Cupl III-I    
Positiv-Cupl II-I    
Tuttibaß I-P    
Tuning : Similar to Werckmeister 1691, f(a')=436 Hz
* Premium version extensions
1 In Obermarchtal (1780) Holzhey installed a Syflöt 2' instead of Fugari 4'

About this virtual organ:

The virtual Holzhey organ is available in two versions:

The two-channel standard version that is based on the original instrument with regard to range (54 manual and 27 pedal keys).

The four-channel premium version is additionally equipped with faders for direct sound and ambience that can be used to adjust the listening position (see below) and an extended range (61 manual and 32 pedal keys).

Recordings have been carefully planned and performed using reference quality equipment. Processing and mastering has been done with the MLP© (multi layer processing) system develped by PROSPECTUM.

Further information about the virtual Weissenau organ can be found [here].

Highlights of this virtual organ:
  • A historically important Johann Nepomuk Holzhey organ from 1787
  • Size: III+P / 41 (42) stops
  • Range: Manuals from C to f3/g3 (54/61 keys), pedal from C to d'/f' (27/32 keys)
  • Sample quality: 24bit/48kHz, processed with our MLP© system
  • Recorded with the impressive reverb of St. Peter und Paul
  • Three release samples per pipe (short/medium/long)
  • Comes with action noises for all stops, keys etc. in MLP© quality
  • Comes with a separate tremulant waveform for each pipe. These samples were made with our TremulantTemplate© algorithm
  • Comes with the original Weissenau temperament (similar to Werckmeister 1691)
  • 4 channel premium version available: Comes with 2 additional ambience channels and extensive perspective control functions





Graphical User Interface:



Sound demonstration:

J.S. Bach - Praeludium a-Moll (BWV 543)
J.S. Bach - Fuge a-Moll (BWV 543)

  • Hauptwerk version: 4.0 or later
  • RAM: 5.92 GB @ 2 channels/16bit
  • RAM: 10.50 GB @ 2 channels/20bit
  • RAM: 11.44 GB @ 2 channels/24bit
  • RAM: 13.16 GB @ 4 channels/16bit
  • RAM: 23.44 GB @ 4 channels/20bit
  • RAM: 25.03 GB @ 4 channels/24bit

Latest version:  1.01

License agreement:   [READ]