This piece for two pianos was composed on March 7th-8th 2009 for a concert planned for the celebration of Walter Zimmermann's 60th birthday on April 15th 2009. A photograph of the composer was converted into an "error-diffused" black and white pixelated image, which was then used to generate - by means of my computer program FOTOSCOR (1998) - a musical score encoded in Encapsulated Postscript of which the excerpt corresponds to the left central to central portions of the photograph: every pixel in the photograph is seen as an equivalently positioned note-head in the score.

"Tischgeistwalzer", German for "table spirit waltz", is an anagram of "Walter ist sechzig", German for "Walter is sixty".