Many people contributed to this project to present the Welte-Mignon piano rolls online. Profs. Kumaran Arul and George Barth provided the initiative and inspiration to bring the piano rolls to Stanford University for use in the study, teaching, and research. Their support throughout every aspect of the work was essential. A number of individuals from the player piano community were very generous with their time and expertise. Rex Lawson assisted in the evaluation of the Denis Condon Collection leading to its acquisition. Anthony Robinson cannot be thanked enough for his generosity in providing his roll scanner design and patiently guiding the project team through its modification and construction. Prof. Craig Milroy assisted the project by guiding Monica Caravias in building an early prototype of the scanner and recommended a top engineering firm to construct the scanner. Brett Swope and Swope Design Solutions designed the scanner from Anthony's concept and meticulously guided its construction through to a successful conclusion. Without his selfless dedication to the project, the scanner would not have become a reality.

Craig Sapp spent numerous hours learning the intricacies of the operation of the camera and scanner. His knowledge, persistence, and careful analysis provided the project with images of high quality and definition that will make the production of new rolls possible and allow for detailed research of the music. He produced the raw MIDI files necessary to create the MIDI files with full expression. His contribution was critical to achieving the goals that were set for the project. Prof. Julius Smith and Zhengshan "Kitty" Shi translated the roll perforations into MIDI and WAV files. Kitty created the algorithm that interpreted the expression coding on the red Welte-Mignon rolls into MIDI notation and fine-tuned it with the assistance of Kumaran so that the music on the rolls can be heard and sounds like a musical performance rather than a mechanical robot. Nathan Coy converted the enhanced MIDI files with expression into the audio files that can be heard on the site.

A large team of experts at Stanford University Libraries were involved in the project. Alyssa Hyslop cataloged all of the Welte and Hupfeld rolls in the Denis Condon Collection. Stanford Digital Library Systems and Services was responsible for all of the digitization work. Doris Cheung was the project manager who guided and coordinated many aspects of the digital work. Tony Calavano advised on many aspects of digital imaging and served as the Digital Lab Manager, and Ben Albritton assisted by accessioning the digital files into the Stanford Digital Repository. Peter Crandall and Andree Claire Bonnepart operated the piano roll scanner to create all of the image files of the red Welte-Mignon rolls. Stu Snydman was critical in guiding the project through many unknown paths to its conclusion.

The Stanford Libraries Preservation Department, especially Kristen St. John and Sarah Newton, advised the project on the safe handling of the rolls, and Jill Sison and Beth Ryan performed delicate and painstaking repairs to brittle and damaged rolls. Many thanks to all of these people and those who supported their work.

Claire Bonnepart
Tony Calavano
Doris Cheung
Nathan Coy
Peter Crandall
Elizabeth Ryan
Craig Sapp
Zhengshan Shi
Jill Sison