| 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 |
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