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Fokker organ emulator for Hauptwerk

version 0.4

The Fokker Emulator is a Custom Organ Definition file for Hauptwerk that enables the Hauptwerk Virtual Pipe Organ software to emulate the microtonal (31 tones / octave) Fokker organ, situated in the Muziekgebouw aan ’t IJ in Amsterdam. The Fokker Emulator does not contain samples of the Fokker organ itself, but instead uses selected samples (slightly modified) of similar registers from the St. Anne’s, Moseley organ sample set that comes standard with the Hauptwerk software. The sounds of these samples are of course not entirely identical to the Fokker organ, but they are similar enough to give a good idea of the Fokker organ’s sound.
The Hauptwerk software is available for both Mac and Windows. The Fokker Emulator works also with the demo version of Hauptwerk, as well as with the Free Edition of Hauptwerk. Unfortunately, starting with the release of Hauptwerk version 5, the Free Edition is not officially available any more.

Installation instructions
Download Fokker Emulator

Ere’s Fokker organ console

version 3.10.2 (22.12.2023)

Ere’s Fokker organ console software is designed to provide assistance when performing on the 31-tone Fokker organ, or on a virtual Fokker organ such as the Fokker Emulator. The most important functions of the software are keymapping and registration changes. It can be used by anyone who plays the Fokker organ or a virtual Fokker organ, and is especially useful when not playing on a microtonal keyboard, as with this software you can easily assign any keys of normal 12-tone MIDI keyboards to play any 31-tone pitches.
To use Ere’s Fokker organ console, you also need the Max software, which is available for both Mac and Windows (purchase is not mandatory).
Please read the instructions for more information! User feedback and eventual bug reports are very welcome by email.

Instructions for use
Download Ere’s Fokker organ console

A composer’s guide to the Fokker organ

Essential information for composers who want to compose for the microtonal 31-tone Fokker organ.

Additional instructions for performers on the Fokker organ

Instructions for using the 12-tone MIDI keyboard(s) at the Muziekgebouw aan ’t IJ

These instructions are relevant only if you’ll be performing on the real Fokker organ at the Muziekgebouw aan ’t IJ in Amsterdam, and wish to use the 12-tone MIDI keyboard(s) available there.

Fokker organ repertoire

This repertoire list aims to be a complete list of all music written specifically for the microtonal 31-tone Fokker organ. It also includes a selection of other 31-tone music and music in meantone temperament, which may potentially be playable on the Fokker organ. Additions and corrections to this list are very welcome by email.

Tables & charts for the 31-tone Fokker organ

31-tone notation
Recommended standard notation for the 31-tone system.

Fokker organ MIDI messages
A table of all the MIDI messages for the Fokker organ.

Fokker keyboard layout
This chart shows the full range of one manual of the Fokker organ.

Fokker organ pitches
A table of all the sounding pitches of the Fokker organ, with their frequencies and cent values.

Intervals on the Fokker organ / 31-TET
A list of all the intervals in the 31-tone equal temperament, with names and cent values.

Fokker organ pipe map
Shows the locations of the pipes on the Fokker organ.

The 16th-tone Carrillo piano

Information about the 16th-tone Carrillo piano
Essential information for composers who want to compose for the 16th-tone Carrillo piano.

Intervals on the Carrillo piano / 96-TET
A list of all the intervals in the 96-tone equal temperament, with names and cent values.

Table of correspondence between the Fokker organ (31-TET) and the Carrillo piano (96-TET)
This file also includes a table of sounding vs. written pitches of the Carrillo piano.

Carrillo piano for Finale
A playback solution for the 16th-tone Carrillo piano in Finale, making use of Garritan instruments. For Finale 2010 and newer.
The download contains one .scl file, one .sfz file, a .mus demo score, and instructions.

Microtonal instructions for Finale

How to write microtones in Finale
Easy instructions on how to enter microtonal accidentals in Finale notation software using Nonstandard Key Signatures.

How to transpose in microtonal systems in Finale
Further instructions on using transposition and transposing instruments in microtonal systems.