TestFlight Beta of pianoscope 3.0

MilanDka

Dear Frank,

Thank you for the explanation and the clear demonstration. I just have a few questions:
1. How did you determine from the graph that F3-A3 beats at 6.9 Hz?
2. Why do I slightly diverge by ear in the A2-F3 range? Here, we tend to go 0.2-0.4 cents lower by ear compared to Pianoscope.

I can only explain this by assuming that the ear perceives multiple influences—various partials or possibly false strings—which slightly adjust the final tuning and tonal color.

Regarding A0-E1 (perhaps up to G1) on very small instruments: Before I got sick, I tuned a second S144 grand and a 106 upright. Both had the same issue. The thirds and tenths were fine, but due to extreme inharmonicity, it just didn’t fit, so I relied more on 17ths, 19ths, and triple octaves. Unfortunately, I didn’t create a static tuning.

I understand that this is probably difficult to program, but in this version, you started using AI for better results. Could you take a closer look at this area?

Edit: I think I’ve found another mistake. In the tone generator settings, I don’t see the option to select Spectrum – Measured Partials and Pure Sine.

Thank you.
With respect, Milan

Frank Illenberger

MilanDka

If you have only activated a single tuning interval in the deviation curve view, pianoscope will show the numeric beat rate:

From afar I can't tell why your ears differ from pianoscope's deviation display. Surely, I cannot rule out that there is some kind of bug in pianoscope. What you could do in such a case is to send me the tuning document and audio recordings of the individual notes in the interval. Then I could do an analysis.

If you have done a tuning with pianoscope in which you don't like certain intervals, simply send me the tuning file and tell we which intervals are problematic for you. Then I can try to understand what you expect and what pianoscope is doing, I only need a recorded static tuning if you do aural corrections.

I have removed the tone generator option for Pure Sine. You can achieve the same effect now by setting the max partials count to one.

Frank Illenberger

MilanDka I had another idea. The reason for the problem you are encountering might not lie in the tuning curve calculated by pianoscope, because it looks very consistent. Instead it may lie in the inharmonicity modeling. Can it be, that the piano you were tuning had bass strings of poorer quality? As an experiment, you could try to increase the inharmonicity weighting to 100%. There is a small chance that it could improve things. All further improvements to inharmonicity modeling must wait for version 4. I already have some ideas for it.

Frank Illenberger

Burkhard In the latest build 1594, pianoscope shows an alert when you open a tuning document that still uses the v1 or v2 tuning curve algorithms with the factory tuning styles. In the alert, you can upgrade the document with a single tap to v3. The alert is only shown once for every document, so if you decide to stay with an older algorithm, the app does not nag you again.

Burkhard

Frank Illenberger Perfekt 🤩

Burkhard

Moin Frank, the use of several microphones slows down the measurement of the inharmonicity and pitch on my iPhone 15proMax.
If I switch to one microphone, it's smoother. Would it be possible to use only one microphone and to vote everyone for the tuning?

Frank Illenberger

Burkhard Thank you Burkhard. This seems to be a problem with background noise. I will look into it.

Jacob L

I'm trying to figure out the passthrough bandpass filter mode. This promises to be an excellent learning tool. It doesn't seem to be working for me though. I turn on the passthrough mode (the icon is dark = enabled) and play a note and I hear the unfiltered audio pass through. But then I tap a partial to listen to, the space around the partial bar turns dark gray, but I don't hear the audio get filtered. Am I missing something?

The way I would like to be able to use this is to simply press a note on the onscreen keyboard and have the bandpass filter set at the fundamental of that note. That way you can practice hearing beat rates of intervals for aural tuning. I think this should be possible by disabling automatic note selection, and selecting the first partial in pass through mode. When I do this, the dark gray passthrough indicator follows the note I tap with a "1" but still no bandpass filtering.

Jacob

Frank Illenberger

Jacob L Thank you for reporting this. As it turned out, in one of the last builds I introduced a regression which broke the live bandpass filter. I've uploaded a new build 1614 to TestFlight which fixes it. So with the new build you can give it another try.

MilanDka

Dear Frank,
During tuning, I turned off the device and turned it back on after 5 minutes. Then the application crashed. This has happened multiple times. iPhone SE.
It only happens in the latest Beta build.
Milan

Frank Illenberger

MilanDka Thank you for reporting this. Unfortunately, I am somehow not receiving any crash logs from your TestFlight, so it's hard for me to fix this. I tried to reproduce the crash on my iPhone SE, but there it works fine.

MilanDka

Dear Frank,

it’s difficult because the device is not connected to the network, and by the time I turn on the personal hotspot on my iPhone 11, the message disappears.

It doesn’t happen three times in a row, but then it does once. I’ll try it at home on Wi-Fi to see if Pianoscope does it.

Edit: I just sent you the app crash at 17:39.

Milan

Rick

I’m finding that measuring for a pitch raise is more difficult using all four microphones. The phone has to be very close to the measured string. All the rest is excellent.

Frank Illenberger

Rick Thanks for the feedback. Can you describe in more details what exactly is more difficult?

Rick

I think the answer is the lower notes need to be played slower with silence in between. Another question: how does one adjust the input level. Is there an optimum setting?
Many thanks,
Rick

Burkhard

Since (1614) it has been much better than before.

It would be nice if I could choose the order of the measurement as with the measurement of the inharmonicity.

JBrasell

Frank Illenberger Same issue on iPhone14. Tried duplicating the pianoscope folder in files app. Still not able to search by other fields.
Will it possibly work with new files created?

Frank Illenberger

JBrasell Whis iOS version do you run? Where do you store your documents? In the iCloud Drive folder or in the a local device folder? Can you try to change a value in one of the instrument fields of an existing document and then try again to search for this new value?

JBrasell

Frank Illenberger Frank Illenberger I’m running 18.3.1 on iPhone 14.
It appears my files are located on iCloud Drive Folder.
I changed the model number on a file and then searched for it. Still unable to find it.
I did have one result that populated under Yamaha that did not have yamaha in the name. It was a duplicate of a file that had Yamaha in the name. 🤷🏻‍♂️

Frank Illenberger

Some beta testers were reporting problems with octave jumping in the automatic key selection, especially with using multiple microphones. In the latest TestFlight build 1622, I tried to fix this issue.

Frank Illenberger

JBrasell Thank you for the information. So far, I could not reproduce your problem on any of my devices. But I've researched the issue, and it could be that this is a system-wide search indexing problem in iOS 18. There is a thread in the Apple discussion forums in which over 300 people say they have similar Spotlight indexing problems.
So it would be interesting for me to know if other searches are affected on your device as well. For example: Can you find a Pages document by searching for contained text?

In the discussion thread, they mention a workaround that solved the problem for some people. It is easy to do, so trying it could also shed more light on the issue. This is what they suggest:

Go to - Settings/Privacy and Security/Location Services/System Services/Suggestions and Search: Turn the switch to off then on. It will take a while (the more stuff you have, the longer it takes), but it will re-index your entire device. Hope I remembered it right and that it helps.

There is also a video showing the procedure.

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