Floating Tangential Tonearm

Jump to Latest
#81
My further answers

3. He declicked and reduced the noise level. I dislike the method because it may reduce other information as well. He is not able to separate the music information from noise and clicks. CD doesn’t have this kind of problem.
Click to expand...

Again an example of purely qualitative statements without any quantitative data! Yes, declicking and denoising is related to certain losses of audio data, but what is the level of these losses, are they listenable and even if (and when) they are, is it preferable to accept them together with a horrific pop, or is better to lose them, together with the pop?

In my new YouTube video I give first a comparison of the original initial part of a jazz piece with the same part after my full editing procedure. I call the difference "dramatic" and I yould never prefer the original one, even if 100 people come here and support the opposite! Listen to this comparison in high sound level.

Later in the clip I show the actual frequency slope of my 30 Hz FFT cut. Followed by an example of a quite "bassy" jazz piece and a demo of a severe pop elimination.

I suggest to visit the site of Mr. Brian Davis, where the problems of denoising and declicking are discussed in detail. I use his declicking software and I am very satisfied! Note the world "Restoration" that Brian uses. This gives the key to the proposed interventions: they rather restore than harm the original sound!

ClickRepair | Audio Restoration | Brian Davies

And .. Yes, I almost forgot.. I could not find a CD version of the "Reminiscences" of the jazz pianist Leonid Chizhik, a part of which I use in my editing demo. But even if CD versions existed for all my LPs, could I afford to buy >700 new CDs?

YouTube
 
Last edited:
#82
When I finally found The Serpent is Rising by Styx. I had it transfered on suposedly good eqipment to not wear it since it wasis like new. Sound just wasnt as good as original. Maybe I will give it another go and manipulate lightly.
@Super100 You know its totally voluntary to choose which method to listen to music. Noone forces you to use same method as PK.

@PK Now we talk so much about digitizing, but do you think your table is or will be suited for just casual listening?
 
#83
@PK Now we talk so much about digitizing, but do you think your table is or will be suited for just casual listening?
Click to expand...

If I understand correctly the word "casual" - no, it is not and probably will be not. That's why I did not develop yet any electronic control device like Stylus Up/Down, Tonearm Left, Right, Home etc. They are all manual and serve only the purpose of digitalization, not that of listening.
 
#84
diyrayk said:
Here is a new approach to a floating linear design, but so far it's been in greater danger of being sunk by criticism than the Titanic trying to dodge an iceberg.

I think Captain PK has some interesting ideas here, and I'd like to see everyone hold back on the gunfire and instead help him steer this ship to see where it goes.
Click to expand...

Amen!

All inventive ideas require development: tweaking, revising, rethinking, you know, the works. This is a diy forum after all and it's a hobbyist forum that should have the spirit of experimentation and playfulness. Not every project is a pursuit of perfection with the neurotic intensity of Dr. Frankenstein! Some people just wanna play around and there's nothing wrong with it. I look forward to this project's further development.
 
#85
Before I selected 30 Hz for cutting frequency, I examined a lot of LPs, jazz and classic - and found that in almost all cases frequencies below 30 Hz are not present. Actually, the frequencies below 40 Hz are also quite rare and/or with very low levels. Nevertheless, I agree that in some rare cases F<30 Hz exist. These are typically cases of electronic music. I found one in the Net, music for meditation, with a long presence of strong 27 Hz signal. And so, where is the problem? I can recognize these rare cases and apply there a second variant of the FFT filter, with 20 Hz cut frequency instead of 30! But removing the very low rumble and tonearm resonance frequencies is beneficial.
Click to expand...

Information under 30 Hz does exist in LP for sure. So, it is completely unnecessary to cut all the information out. If there is serve low rumble which may cause trouble, you need to go back to your LP gear and fix it. Cutting all the information under 30 Hz is simply not a good strategy to make digital copies of LP. Arm resonance is never a problem for digital copies of LP. If arm resonance is a problem, there must be something else to cause the problem. For example, if the frequency of low rumble is almost the same as arm resonance.

For certain reasons, related to both parts of the pair, this is not true and it is derived from frequency response measurements with a proper measuring disk. What I do is to apply a digital frequency correction to the recorded signal, so that the observed deviations from the linearity are reduced to about ±0.2 dB. A really trivial action, similar to the fine Preamp input capacitance tuning to "match" the Cartridge, applied by some experienced enthusiasts.

The CD has nothing to do with this. The CD may not exist.
Click to expand...

You equalize the frequencies for your digital copies of LP’s. It means you alter its sonic characteristics of original copies. Before an LP hits the market, the mastering engineer always listens to the LP to make sure this is what he wants you to listen to under normal conditions. If your LP gear can’t have a good frequency response, you need to get better phono, better cartridge, and better tonearm. Once you alter the frequency response of your digital copies, your digital copies are NOT what the mastering engineer intends to. You may like the altered version better. It is your personal choice. But just don’t claim your copies are better than original ones. This is why I am against to alter the frequency response of digital copies.

The equalization of CD happens in the process of mastering. Since a very cheap CD player can correctly reflect the frequency response of a CD. So, such a problem doesn’t exist for CD.

Finally, I am not strongly against de-click. De-clicking is to reduce the level of clicks so the click noise will hide in the music information. But I am strongly against to reduce the noise level of a digital copy because noise is much-complicated issue. Reducing noise levels may reduce music information as well.

Anyway, if you like to listen to your altered version of digital copies, it is your choice. But, just don’t claim your copies are better than original ones which the mastering engineer wants you to listen to.
 
Last edited:
#87
Well I also wouldnt choose to cut at 30hz, but Im no expert. If a file can be analysed to not have musical content below, it might not hurt. Maybe PKs speakers dont go lower with noticeable volumelevel. If sub 30 is problematic for ones speakers I would also say it would be the wrong reason to cut
 
#91
For Guerilla: the frequency response of my principal home system, after measuring and equalizing with REW and Equalizer APO. This is valid, naturally, for a small area around the measured "sweet spot", which forms a isosceles triangle with the two satellite speaker's tweeters. The subwoofer uses a 30 cm unit in a 100 l closed and well damped box. I can use it also as a bass-reflex, which has, in addition, an adjustable port, but I find the sound of the closed box more "stiff" and defined.

Saloni.png - Google Drive
 
#93
Panayotis Kritidis said:
Why did you abandon the rails idea?
Click to expand...
What I think is 'when' pulley engages with glass wall it makes contact point, which in vertical plane holds steady, so not to worry too much about boat movement on water.
But if more refinement is required on stability (see first pic part with cyan arrows) we can move the pulley contact point near the 'Tonearm pivot' or if possible better still (if possible) just below the pivot (see second part of pic) this will make it rock steady I guess. as whatever miniscule movement of water+boat is will be hindered by that contact point.
Mind you these are just rough sketches, not to scale just to illustrate the concept. Necessary things like pulley point and stylus-record groove point at same level should be done.
regards
 
Last edited:
#94
sorry could not post picture in previous post
 

Attachments

  • pulley new position.jpg
    pulley new position.jpg
    33 KB · Views: 152
Last edited:
#95
Thank you, Hiten. I will think on this catamaran variant (2). To be consistent with my thinking, note that in TTT the tonearm rotation axis is not as high, as in your pictures, but quite lower, at the level of the pulley. This complicates the things with variant (2)..

BTW, can you please tell me, is it possible to upload here pictures directly from my computer?

Best regards.
 
#98

Attachments

  • Correct.png
    Correct.png
    15.4 KB · Views: 163
Last edited:
You must log in or register to reply here.
Top Bottom