| Digest Nr | Subject and Author |
|---|
 |
| 2024.09.21.01 | Duo-Art 6716 "Meditations No. 1" Armbruster, from Julian Dyer |
| 2023.01.20.01 | Seek "Ave Maria" Duo-Art 102835 Robert Armbruster, from Barb Barton |
| 2015.08.17.06 | Seek Duo-Art 6716 "Meditations No. 1" Armbruster, from John Grant |
| 2013.05.21.02 | Seek Duo-Art "Millions d'Arlequin" by Armbruster, from Duncan James |
| 2012.02.05.02 | Seek Duo-Art Demonstration Roll by Armbruster, from Andre Quier |
| 2011.04.18.03 | Seek Duo-Art Rolls by Bauer and Armbruster, from Claude Williams |
| 2005.04.30.03 | Robert Armbruster & "Variations on Chopsticks", from Bill Flynt |
| 2005.04.29.06 | Robert Armbruster, Duo-Art Artist & Arranger, from V. Austin |
| 2002.09.22.10 | Edgar Fairchild, Wilbur Chenoweth, Robert Armbruster, from Tom Lear |
| 1999.07.09.08 | Seek Armbruster Roll "Ave Maria Op. 52 #6", from Gary Stevenson |
| 1999.07.09.06 | Armbruster Duo-Art Pop Rolls in Electronic Format, from Spencer Chase |
| 1999.07.08.15 | Robert Armbruster Duo-Art Rolls, from Douglas Henderson |
| 1997.04.01.10 | Gershwin and Armbruster, from Douglas Henderson |
|
