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I did a lot of tunings with pianometer, I am fine, only in my opinion it has a too strong stretch on the treble, could it be lowered a bit? in practice it rises too much compared to the original frequency, do you think? thank you

When you start tuning, you are offered a variety of piano sizes to work with. Play around with these, maybe your piano doesn't match the profile you selected. I tune my Steinway B with concert grand selected and am very happy with the treble stretch. Not so much with the bass section, but I prefer tuning the bottom ten notes by ear only anyway, to m ears they need 4-8 cents below what is suggested to giv you that organ like bass sound in octaves.

the instructions on the official website do not say to choose a type of piano:
Quick start steps for tuning a piano:
Create a new tuning file (Menu > New tuning file) or load a saved file (pro version only)
Sample inharmonicity to create a tuning curve. Play several notes across the range of the piano, playing each note for approximately 2 seconds. It is important to sample notes in the mid-section, tenor, and bass. The program is always listening and will automatically calculate an ideal tuning curve based on the inharmonicity of the sampled notes. Note: if the unisons are significantly out of tune you will get better and faster results by using mutes to isolate single strings.
Rough tuning (optional): If the piano is more than about 10 cents sharp or flat you should do a rough tuning (“pitch adjustment” or “pitch raise”). Even if the piano is within ±3 cents of standard pitch it is still advisable to run through the notes quickly and fix any outliers, as this will result in a better fine tuning. The benefit of doing this pre-tuning pass is that the app will gather more inharmonicity data and further refine the tuning curve. If you skip this step you might consider quickly sampling inharmonicity for all the notes on the piano (except the treble) which takes less than 2 minutes.
Lock the tuning curve using the “ear” button on the right. This stops the inharmonicity measurement and prevents the tuning curve from changing during a fine tuning.
Tune the piano. The recommended order is to tune the midsection first, starting at the tenor break (often around D#3), tune up through the treble, and then tune the bass last.

Under the "tuning file settings", you should find "style" setting. Tap on that and you can choose any of the available options or alter one to create your own via the general settings style editor. Lots and lots of choices. Find one that fits what your ear wants to hear!

Under the "help" menu, look for tuning styles (interval weights) for further instructions

Ron Koval

ok thanks

under the "tuning file sttings" selecting concert grand instead of baby grand should also change the stretch applied, baby grand has more stretch than concert grand, right?

"The "piano type" is only for file management purposes, to give you a pretty picture to remember what type of piano you are opening."

A quote from this thread where Anthony Willey responds to questions.

http://forum.pianoworld.com/ubbthreads.php/topics/2960201/4.html

so you can also skip this step: select the note with the lowest unwound (plain wire) string

The piano type and the lowest unwound string in the tuning file settings are for your own tracking purposes only. They have no effect on the tuning. But the same data is collected for a pitch raise, which it does affect.

To decrease the treble stretch, try: menu > general settings > Style (interval weights) > New. Tap on "Octaves" and increase the 2:1 octave weight to 10. You can also play with decreasing the nineteenth weight to zero and manually adjusting the "extra treble stretch" at the bottom if you want. Then save the new profile.

The 2:1 octaves will always be stretched wide by other intervals. Most people prefer that. You can reduce the weight of those other intervals (notably the 3:1 twelfths) to make the 2:1 octaves a bit more pure, but I don't recommend that.

ok thanks, it is only for pro version, not for plus.