I haff to track down her real name
I do a test to see if I fix lp static. I clean the Moiseiwitsch and Kentner and leave over night to see what dust they attract under black light.
At least three times as many little particles on Kentner as the alcohol discharge plus micro layer of silicone left on Moiseiwitsch.
The swirlies are from pressing and not related to cleaning stuffs.
Gonna see if this shit melts pre plastic era LPs. Cleaned a side of Charles rosenās only listenable album (Debussy etudes) which is pressed in that Remington style el cheapo plastic. Itās trashed so no loss, also itās Charles Rosen so no loss if mint.
If works will clean barereās stuff again and see how to go.
Iāve heard this!
I forget I have the Rosen files sitting around. I should finish that stick in ass garbage, tho when young he could play the piano pretty well even if that style makes me bored as F.
Lol, guy who transferred stuff for Ruth Slench big retrospective charges 40 bucks per hour of transferred and remastered tape shit. Thatās less than an uber deliery of a cheeseburger.
Rosen disc with zero hiss reduction so you can hear his details. Sounds horrible first few seconds but fine afterward.
By the time he made most of his recordings he was deep into smelling his own farts as an academic so cool he left some recs when he was practicing.
Can we have playing Rachmaninov bare?
Randomly the Ho play super physically up until his 1980s vids. This have doubled frame rate and I unblur his fingertips what I could. No weight transfer squishy pussified modern sound here. Bro slapping keyboard like itās a (male) hookers ass.
Glad you clarified that.
Parts of this look OK even tho Google throws away 90% of the data. Coolā¦
Haha datz right!
About 3 mins in heās like ātime to BASS UNLEASH rapeā and slam dunks those basses right from da wrist.
Most legendary White House unleash after da Lola visits and pozz da disgraceful stunt where he played a commie song about killing soldiers lmao
Iād say the desire for 99% accuracy in a live perf is what had da biggest effect on modern mofo style of tech⦠every motion is carefully prepared.
These spanks are so wikid! Who cares if the passagework sometimes full blown spaghetti noodles. You can barely make that out in a hall anyway.
Exactly! Da Ho often play in smaller venues with the same insane projection he did in Carnegie
He understood very well that garbled passage work can get smoothed over by the acoustics anyway
This has the composite loss factor for that tape I like so you can calculate your shit. I put some on the shell of these fancy headphones because i noticed it was resonant around where it damps well. They got a little clearer!
Also using this I realize I need fluid damping to damp low frequencies. I bust out the chatGPT to calculate CST rating for my old greasy KAB wellās ideal fluid based on surface area of the damping paddle. A couple hundred thousand, which wasnāt what I was using before, so explain why it was just ok. Also supposedly wonāt mess with compliance.
Silicone should be here in two weeks. Not sure how many ccās.
Sorbathane damping thing. It fell out after Tatum disc transfer so I glue that bugger on there. Will see if it sounds good again. This also what I did to get that Hofmann fire music transfer years back but in a modified denon 103 with a 3 mil tipā¦
Oh momma! (Blue velvet reference)
Oooh I have .65cst silicone for something else.
Gonna see if it will hydroplane in a pool of that sheeyat. My friend shatGPT help me with smart people stuff. Apparently baby oil and other lube Iād tried too viscous to plane.
āLetās recalculate using the radius of 5 inches.
Step-by-Step Calculation
-
Determine the Linear Velocity of the Needle:
- Convert the radius to meters:
[
r = 5 \text{ inches} \times 0.0254 \text{ meters/inch} = 0.127 \text{ meters}
] - Calculate the angular velocity ((\omega)) at 78 RPM:
[
\omega = 78 \text{ RPM} \times \frac{2\pi}{60} \text{ rad/s} \approx 8.168 \text{ rad/s}
] - Calculate the linear velocity ((v)) at radius (r):
[
v = r \cdot \omega = 0.127 \text{ meters} \times 8.168 \text{ rad/s} \approx 1.038 \text{ meters/second}
]
- Convert the radius to meters:
-
Determine the Reynolds Number:
- The Reynolds number ((Re)) is given by:
[
Re = \frac{\rho v h}{\mu}
]
where:- (\rho) is the density of the lubricant (assumed to be similar to water, (\approx 1000 \text{ kg/m}^3)).
- (h) is the film thickness (gap between the needle and the record, assume (1 \times 10^{-6} \text{ meters})).
- (\mu) is the dynamic viscosity of the lubricant.
- The Reynolds number ((Re)) is given by:
-
Estimate the Required Viscosity:
- Rearrange the Reynolds number formula to solve for (\mu):
[
\mu = \frac{\rho v h}{Re}
] - Assume (Re = 1000) for effective lubrication:
[
\mu = \frac{1000 \text{ kg/m}^3 \times 1.038 \text{ meters/second} \times 1 \times 10^{-6} \text{ meters}}{1000}
\approx 1.038 \times 10^{-6} \text{ PaĀ·s}
]
- Rearrange the Reynolds number formula to solve for (\mu):
-
Choose a Suitable Lubricant:
- The calculated viscosity is very low, indicating that a very thin, low-viscosity lubricant is needed.
- Silicone oil with a low viscosity (around 1 cSt or (1 \times 10^{-6} \text{ PaĀ·s})) could be suitable.
- Other options include light mineral oil or specialized audio lubricants designed for minimal friction.
Summary
For a 2.5 mil record needle traveling at 78 RPM with a radius of 5 inches, a very low-viscosity lubricant such as silicone oil with a viscosity around (1.038 \times 10^{-6} \text{ PaĀ·s}) (approximately 1 cSt) is required to achieve hydroplaning.
I was skeptical about AI but now Iām on board. It makes it so I donāt have to learn things. Wikid~!
To determine whether the boron nitride powder will settle or stay suspended in the silicone oil, we need to consider the Stokesā law for sedimentation velocity, which gives us an idea of how quickly particles will settle out of a suspension under gravity.
Stokesā law is given by:
[ v = \frac{2 (\rho_p - \rho_f) g r^2}{9 \eta} ]
where:
- ( v ) is the sedimentation velocity.
- ( \rho_p ) is the density of the particle (boron nitride powder).
- ( \rho_f ) is the density of the fluid (silicone oil).
- ( g ) is the acceleration due to gravity ((9.81 , \text{m/s}^2)).
- ( r ) is the radius of the particle.
- ( \eta ) is the dynamic viscosity of the fluid.
Given data:
- Density of boron nitride (( \rho_p )): Approximately (2.3 , \text{g/cm}^3).
- Density of silicone oil (( \rho_f )): Approximately (0.97 , \text{g/cm}^3).
- Dynamic viscosity of silicone oil (0.65 cSt): Convert to (\text{Pa}\cdot\text{s}). Note: (1 , \text{cSt} = 1 , \text{mm}^2/\text{s}) for kinematic viscosity, and dynamic viscosity ( \eta = \text{kinematic viscosity} \times \text{density} ).
[
\eta = 0.65 , \text{cSt} \times 0.97 , \text{g/cm}^3 = 0.6305 , \text{mm}^2/\text{s} \times 0.97 , \text{g/cm}^3 \times 10^{-3} = 0.000612 , \text{Pa}\cdot\text{s}
] - Radius of the particle (( r )): 0.5 microns ((0.5 \times 10^{-6} , \text{m} / 2 )) = (0.25 \times 10^{-6} , \text{m}).
Now we can calculate the sedimentation velocity ( v ):
[
v = \frac{2 (2.3 \times 10^3 , \text{kg/m}^3 - 0.97 \times 10^3 , \text{kg/m}^3) \times 9.81 , \text{m/s}^2 \times (0.25 \times 10^{-6} , \text{m})^2}{9 \times 0.000612 , \text{Pa}\cdot\text{s}}
]
[
v = \frac{2 (1.33 \times 10^3) \times 9.81 \times (0.25 \times 10^{-6})^2}{9 \times 0.000612}
]
[
v = \frac{2 \times 1.33 \times 9.81 \times 6.25 \times 10^{-14}}{0.005508}
]
[
v = \frac{163.84225 \times 6.25 \times 10^{-14}}{0.005508}
]
[
v = \frac{1.024 \times 10^{-11}}{0.005508}
]
[
v \approx 1.86 \times 10^{-9} , \text{m/s}
]
This velocity is extremely small, suggesting that the boron nitride particles will settle very slowly in the silicone oil. In practical terms, this means the suspension can be considered relatively stable for a significant period of time. However, over a long duration, settling might still occur, especially if the mixture is not agitated. For long-term stability, a dispersant or stabilizer might be needed to ensure the boron nitride remains suspended.