Bartelt Immer, born on November 3, 1956, in Emden, is a renowned organ builder from East Frisia, known for his expertise in restoring historic organs and creating highly regarded new organs. He has developed innovative techniques in organ mechanics and wind supply, and conducted scientific research on the impact of pipe wall thickness on sound, aiming to enhance tonal intensity through material manipulation. Besides organs, Immer also restores historical keyboard instruments such as harmoniums and pianos.

Immer's work focuses primarily on the restoration of historical organs, adhering to strict museological principles by ensuring reversibility, using traditional materials, and providing detailed documentation. His work is particularly prominent in the organ landscape of East Frisia, but he has also restored organs in other regions, including the Canary Islands. Additionally, Immer has been involved in a research project aimed at reducing lead corrosion in organ pipes from the 17th and 18th centuries. His dedication to the craft is evident in his careful restorations and the innovative techniques he continues to develop.

https://orgelbau-immer.de/index.html
https://de.wikipedia.org/wiki/Bartelt_Immer