| Digest Nr | Subject and Author |
|---|
 |
| 2022.09.07.01 | Wurlitzer Band Organ Theory of Operation, from Don Teach |
| 2022.09.03.01 | Wurlitzer Band Organ Theory of Operation, from David Miller |
| 2011.10.30.01 | Singing Bird Tweeter Theory, from Moe Goldy |
| 2005.09.08.03 | Ampico " Theory of Music" Piano Rolls, from Spencer Chase |
| 2004.06.08.02 | Copyright Theory & Boosey vs. Whight Ruling, from Matthew Caulfield |
| 1997.03.07.14 | Valve Gap Theory, from Douglas K. Rhodes |
| 1997.03.06.08 | Valve Gap Theory, from Karl Petersen |
| 1997.03.05.19 | Valve Gap Theory, from Richard Vance |
| 1995.06.15.01 | Re: Roll velocity - a new theory (?), from Zoltán Jánosy |
|
