Conrad Piano Service (520)784-1549

Robert Conrad, Registered Piano Tuner/Technician, Tucson, AZ

The Prime 5ths

The prime 5ths are used to determine the best prime octave width for the particular piano being mapped and eventually tuned. When the widths of the prime 5ths are added together, when that total is -3.0, the prime octave width is about right. Continue reading

Mapping A0

Mapping A0 can be done any number of ways. It can be mapped however you like, but just like A1, once you have it where you want it, it's location must be measured using it's 4th partial, since the LC Spreadsheet uses the 4th partials for A0 - A4. Continue reading


The idea of actually being able to tune and/or measure pitch on any piano to within one tenth of a cent accuracy is very wishful thinking. And the idea that the piano 'system' is capable of a stability within one tenth of a cent is also very wishful thinking. Please keep that in mind when reading these posts. Continue reading


'Mini-targets' are notes D4 & E4, and D3 & E3. Even if the prime octave width is perfect, the scaling contained within that octave will often result in a pair of 'uneven' or 'unbalanced' prime 5ths (A3/E4 & D4/A4). Continue reading

What is a Partial Change?

When using any tuning software, different partials are used to tune different parts of the piano.   The partials used are designed into the software.  All tuning software systems therefore contain partial ‘changes’ as part of the tuning.… Continue reading

Download Tunings

To make them easily available, these download tunings are in both .SAT and Excel file formats. Also included is a Header Sheet in Excel form, which contains the piano mfg, and model, and the settings for each 'A' on the tuning. Continue reading

“Double Octave Beat” – DOB

DOB allows us to easily stretch or contract a template or tuning stored in the SAT. A DOB setting of .1 expands the double octave - increasing the beat rate of the double octave - by one tenth of a beat per second. A negative or minus DOB setting contracts the width of the double octave thereby decreasing the beat rate of the double octave in one tenth beat per second increments. DOB can be used where ever more or less stretch is needed. DOB is a feature found on the Sanderson Accu-Tuner III and IV. Continue reading

SAT IV Users:

The SAT IV has more than double the memory of the earlier SATs. The SAT IV actually has 4 separate memory 'areas', for 4 different groups of tunings. Pages 1-120 are exactly like the older SAT IIIs. They can be written to or written over, can be saved to a file, and sent back and forth from SAT to the Piano Librarian Program - Piano Librarian to SAT. Pages 121 - 140 contain special pages used for storing sequences, temperaments, custom pitch raise amounts, Exam pages, and so on. Pages 141-309 contain tunings provided by Inventronics. These Inventronics tunings, are 'protected' and cannot be lost, altered, damaged, or written over. But they can be tweaked with DOB, copied and pasted, &c. Pages 310-589 we refer to as the 'upper memory'. These 279 pages of upper memory are available for us to use. Continue reading

Excel (Spreadsheet) Tuning Organization

For those without Accu-Tuners, or for those with older Accu-Tuners without the Piano Librarian software, the download package may still be of interest. In addition to the tuning files in the .sat format, the download package also contains the templates in the Excel Spreadsheet format, for opening with Excel or any other spreadsheet program. Continue reading

Accu-Tuner Sales

Sanderson Accu-Tuner = the best piano tuningThe Accu-Tuner allows the technician to become as involved as he wants in the tuning process. The Accu-Tuner is a sophisticated and accurate pitch measuring device,

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