And instead, by what physical principle does the sound become more singable, clear, and less reverberant? I am not just talking about an annoyance being eliminated, but of a true change in general timbre. I remember that I did not silence the entire duplex scale, but only the portion corresponding to G#3 (which, when plucked with a plectrum, produces an A).
It certainly becomes poorer in terms of harmonic richness, but because you hear the fundamental more clearly, it gives you the impression that it is more sonorous.
I'm updating you on the instrument. I positioned the bass traps and two days ago the tuning technician came. The instrument has been poorly tuned other times; this time he tuned by thirds, checking octaves and tenths in the various registers. He wanted to give me a slightly rising tuning in the treble and a bit of a falling tuning in the bass, and just with the tuning alone, the instrument became more "bright" and singing. He eliminated the buzzing by passing a kind of screwdriver under the strings, near the terminations. He found some small problems, "trifles" according to him: the dampers were not rising along with the pedal, so he had to adjust them for me. While adjusting the damper mechanism, he found an imperfection in the regulation that led me to feel excessive play at the bottom of the key: now it actually isn't felt, although honestly I never noticed it, and then I didn't understand the link between dampers and aftertouch (if that is what it is). He found the keyboard excessively "responsive" and adjusted the repetition springs and lubricated the pedal springs. For the rest, everything is okay! Then he voiced some hammers, shaping a few of them. He said that they were, in his opinion, deliberately rounded to soften the sound, although he stated that this isn't quite correct. Anyway, according to him, the hammer rail is fully functional and he plans to replace it with an original Yamaha one in a couple of years. I don't fully agree with this last point: I love the "European" sound of the Abels; for example, with my piano, I like the fact that you can feel the percussion, something I normally perceive more faintly in Yamahas. In the end, he silenced a bit more of the duplex scale. I am attaching a file, considering the limitations of a recording made with a tablet.
Timbrally it doesn't blow me away, they seem to me like sounds that develop mainly on the fundamental of the sound, a bit "rubbery".... even the sustain doesn't seem excellent to me, almost like a shorter piano (soundboard a bit rigid?)
I would also have something to say about the tuning, but one must be fair.
The sustain is there but it isn't noticeable in the recording because the tablet performs digital compressions and cuts on certain frequencies, particularly the high ones. I admit that perhaps the sound is not the best, but for now I cannot afford the cost of replacing the hammers. Usually, that sense of "rubberyness" disappears after a week from tuning: a technician explained to me that the piano must always be tuned slightly tighter than the desired result. In effect, I find this to be true: during the first few days, there is always a "mute effect." I don't know if this is normal and I pose the question to you. Anyway, it didn't affect the top notes (apices).
I respect your technician's opinion, surely he also told you that he tuned it rising because then it drops...? I don't agree with this approach; I understand the recording problem, but I have several videos made with tablets and smartphones and I recognize their limits; your hammers do not have the right elasticity, in my opinion obviously. It is wrong, always according to me, to tune by striking deeply; it is an outdated technique.
No, he said he tuned it bright (crescendo) due to issues with disharmony. As for the hammers, we all agree they have lost their elasticity and I need to think about a replacement. Abel or Yamaha?
The right hammer, there are no such things as Avel sheep, Renner sheep, or Yamaha sheep. Generally, when the factory provides the correct spare part, that is what is ordered; what is much more important is how it is prepared.
I am attaching a short video of a piano like yours in terms of size and age probably, recorded with a tablet. The compression is fine, everything is fine, but you can distinguish a live sound from a dead one. Here, contrary to what you said, the hammer (a 35-year-old hammer mill) is treated with a slight voicing on the tip, superficial.... generally the result is stable over the course of two or even more tunings, so I don't understand the sense of overdoing it "because it will all go back to normal anyway".... instead, one must go slowly because sometimes voicing is an irreversible process if you exaggerate, and then deep punctures at 2 o'clock, to be clear, do nothing but impoverish the sound of harmonics, while the attack remains "a bit ugly".... In this sector, obviously, technicians have different opinions, all of which are respectable; absolute truth does not exist... So take my intervention as a personal opinion.
I take the liberty of disagreeing regarding the recording discussion. One cannot rely on a recording like this. The microphone is saturating; it was probably placed on the piano or otherwise in extreme proximity, furthermore some phones have loudness compensation to make the words of the person being recorded in video intelligible, there is no dynamics. The sound is extremely compressed, both in terms of dynamics and in terms of digital compression (mp3), I would even say at extremely low bitrates. Decidedly insufficient for being able to express opinions that have a realistic sense. The recording posted by giovannig is decidedly better regarding audio compared to the one posted by francescochopin and, although with due precautions, it can be indicative for expressing an opinion. That of francescochopin, definitely not.
Then it must be said that as for my pianos, I have one in every room, I'm only missing one in the bathroom; I keep them slightly shiny because they are always closed and then there is always time to clean them if needed (but these are choices).
This one I think is from an iPhone, you can make something out of it