The St. Wolfgang church in Regensburg was designed by Dominikus Böhm and consecrated in 1940. The Willibald Siemann company (Munich and Regensburg) then built their opus 512 for this church. Due to war damage and the extinction of the company Siemann their largest preserved instrument was never finished. 1948 Michael Weise from Plattling restored, extended and changed the instrument. Today, the organ still largely corresponds to this form, about 85% of the main organ pipes and most of the technical components go back to Siemann.

In 1961 Friedrich Meier, Plattling added the so called portal organ that was aimed at in 1948 already. Some technical and sound changes took place on both organs in 1985 and 2004.

In 2018 we carried out a fundamental renovation of the complete organ construction. In the main organ a number of stop changes could be reversed in the sense of the original condition. The changes that had taken place in the meantime were based on intensive studies of the pipes and documents by the organist Thomas Engler. The wind system of the main organ was newly created with large volume, weight bearing magazine bellows. Further works concerned the improvement of maintenance and voice access and safety in the organ as well as the installation of protective roofs above the pipes.

The portal organ by F. Meier will serve in a special way to the accompaniment of the choir. It is still called a choir organ in spite of its location in the back of the congregation. The tonal possibilities of the instrument were significantly improved by the addition of a glass swell, installation of single tone controls and modifications to the disposition. All stops of the choir organ are doubled at the console and can therefore be used in two „virtual“ divisions.
The wiring of both organs has been renewed and a mobile three manual console has been delivered. (A second identical console is prepared). In the console an innovative coupling concept could be realized, in that each manual of all three can be played via keys embedded in the key cheeks. The Great in 8′ range, all others in 16′-, 8′- and 4′-range. There is also the option of freely programmable coupling according to the system „Sinua Castellan“. Despite these varied possibilities, the key desk remains clear and ergonomic. When the organ is switched on, the activated manual assignment corresponds to the original (choir organ not activated). Together with the organist of St. Wolfgang, Thomas Engler, and Gerhard Siegl as an organ expert, we were able to realize this project in the field of tension between a restorative approach and forward looking change.

Hauptwerk C-a‘‘‘
Bourdon   16'
Weitprincipal   8'
Hohlflöte   8'
Gemshorn   8'
Dulciana   8'
Octave   4'
Nachthorn   4'
Quinte   2 2/3'
Octave   2'
Cornet 3-5fach   8'
Mixtur 5fach   1 1/3'
Trompete   8'
Clairon   4'
Positiv C-a‘‘‘
Viola di Gamba   8'
Rohrflöte   8'
Singend Gedackt   8'
Geigenprincipal   4'
Querflöte (überblasend)   4'
Octavin (prinzipalig)   2'
Sesquialtera 2fach   2 2/3'
Scharff 3fach   1'
Krummhorn   8'
Schwellwerk C-a‘‘‘‘
Quintatön   16'
Hornprincipal   8'
Fernflöte   8'
Salicional   8'
Unda Maris   8'
Ital. Principal   4'
Blockflöte 1 4'
Nasat 1 2 2/3'
Feldflöte 1 2'
Terz 1 1 3/5'
Sifflöte 1 1 1/3'
Kleinoctave 1 1'
Echomixtur 4fach 1 2'
Rankett 1 16'
Deutsche Oboe   8'
Pedal C-f‘
Contrabass 2 32'
Principalbass   16'
Subbass   16'
Zartbass 3 16'
Octavbass   8'
Gedacktbass   8'
Jubalflöte   4'
Rauschpfeife 3fach   2 2/3'
Posaune   16'
Trompete 2 8'
Clairon 2 4'
Chororgel A C-a‘‘‘
Principal   8'
Gambe   8'
Rohrgedackt   8'
Octave   4'
Kleingedackt   4'
Quinte 4 2 2/3'
Gemshorn 4 2'
Chororgel B C-a‘‘‘
Principal   8'
Gambe   8'
Rohrgedackt   8'
Octave   4'
Kleingedackt   4'
Quinte 4 2 2/3'
Gemshorn 4 2'
Pedal Chororgel C-f‘
Untersatz 5 32'
Gedacktbass   16'
Principal 6 8'
Gambe 6 8'
Rohrgedackt 6 8'
Choralbass   4'

1 SW-Oberlade

2 Extension

3 Windabschwächung

4 ausgebaut bis a'''', über 4´-Koppel Effekt von Rauschpfeife 4f.

5 C-H akustisch

6 Transmission

Hauptorgel: elektropneumatische Kegelladen
Chororgel: Kegellade mit Einzeltonsteuerung, gesamte Chororgel schwellbar

feste Koppeln Manual I: HW 8', Pos 16', Pos 8', Pos 4', SW 16', SW 8', SW 4', ChO A 16', ChO A 8', ChO A 4', ChO B 16', ChO B 8', ChO B 4' - beim Einschalten aktiv: HW 8'
feste Koppeln Manual II: wie Manual I - beim Einschalten aktiv: Pos 8'
feste Koppeln Manual III: wie Manual I, zuzüglich Oberlade SW 16', Oberlade SW 8', Oberlade SW 4' - beim Einschalten aktiv: SW 8' + Oberlade SW 8'
feste Koppeln Pedal: HW, Pos, SW, Ped HO, Ped ChO - beim Einschalten aktiv: Ped HO
Koppelbetätigung in den Manualen durch Taster in den Klaviaturwangen (Ausnahme Oberlade SW), im Pedal durch Pistons

Nebenzüge und Spielhilfen:
Zungen ab (General), Einzelabsteller Zungen, Mixturen ab (General), Koppeln aus Walze, Sequenzerleisten unter II & III ab, 10 freie Funktionstaster, Taster "Neue Koppel", Taster "Undo", Tutti (an/ab), Registerfessel, Sostenuto für I-III je als Taster, Sostenuto Ped als Piston, 2x Sequenzer-Registrant, 2 Pistons vorwärts, 1 Piston rückwärts, unbegrenzte Anzahl an Setzern, pro Setzer 3000 Kombinationen (aufgeteilt auf 60 Ebenen/A-E/1-10), Piston HO ab (Traktur), Piston ChO ab (Traktur)