Gilberto Guarino plays Dieterich Buxtehude: Chorale Prelude "Vater unser im Himmelreich", BuxWV 219. Hauptwerk 4 - Huß/ArpSchnitger Organ - Cosmae Kirche, Stade, Niedersachsen, Deustchland. Sample Set by Organ Art Media - Prof. Helmut Maier.
ILLUSTRATION I: "Musizierende Gesellschaft", by Johannes Voorhout, Hamburg, 1674.
It is now almost definitely established that Buxtehude is actually the viol player. Johann Theile is the third person depicted, the one with the music sheet on his knee.
As one can read in the "Museum für Hamburgische Geschichte", where the masterpiece is in permanent exhibition, a picture displaying a certain resemblance with the young man with his right elbow on the music sheet, but certainly not with the viol player, was recently discovered in a collector´s album containing portrait etchings of famous personalities, compiled by the Lübeck law man Carl Heinrich Dreyer (1723-1802).
The highly important text drives the argument to a close with the following conclusion: "So, if one is looking for Buxtehude in this painting, he should certainly have to be the viol player. Indeed, the gentleman with the viol is plucking the notes D and B, Buxtehude´s initials."