How To CODM:

Guide to Hauptwerk's Custom Organ Design Module

This free guide walks a would-be Hauptwerk programmer step by step to coding their own custom organ to work with the Hauptwerk program and the sample sets of their choice, as well as basic debugging and voicing.


Reed Organ Tuning Calculator

Free Excel file for calculating the frequencies your reed organ should be tuned to

Many Reed organs were not tuned to A=440 as their pitch standard, and adjusting a lot of old reeds to fit that standard is a time consuming process that may end up damaging a reed that cannot be replaced. This Excel table helps you calculate what frequencies the other reeds in a reed organ should be based on your measurement of the pitch standard A. To use it, use a recording or tuning meter to find what the pitch of your central "A" is at. Then, enter that value into the A=440 cell in the excel spreadsheet. The spreadsheet will automatically calculate the frequency of all other reeds and the frequency of any celeste reeds as well based on that pitch.