| Digest Nr | Subject and Author |
 |
| 2020.01.27.03 |
Moving Aids for a Foot-pumped Player Grand, from David Dewey |
| 2020.01.25.04 |
Moving Aids for a Foot-pumped Player Grand, from Paul Johnson |
| 1998.11.09.20 |
Tuning Organs Using Electronic Tuning Aids, from Rob Goodale |
| 1998.11.07.09 |
Electronic Tuning Aids, from Matthew Caulfield |
| 1998.11.06.03 |
Electronic Tuning Aids, from Rob Goodale |
| 1998.11.05.05 |
Piano Tuning Aids, from Roger Waring |
| 1996.10.06.03 |
Re: Electronic Tuning Aids, from Richard Moody |
 |