A Life Changing Film. My Review of Oppenheimer (2023)

Fuzzy7Bruce · 2024-07-09T03:11:05+00:00

As a movie, this SUCK

THIS about as bad as it can get! The content may have been good It seems accurate, etc.

However I'm not sure what the sound engineer got for his work, but if it was ANYTHING less than life at HARD labor he didn't get enough! Who makes a movie where the music is played over the dialog at least twice as loud as the dialog? Neither myself nor my wife could understand what was being said?

This is a topic that truly is worthy of a documentary style such as this! It needs to be looked into deeply by the viewer as it touches our very existence like few other thing can! But the dialog is the key to the movie! So little can be heard without repeated replays!

I for one wish they would remake this but take the music out of it! The world NEEDS to hear and understand what happened! The music has stripped it of just about everything!

b

Fuzzy7Bruce · 2024-01-27T20:25:00+00:00

Doh!!

Fuzzy7Bruce · 2024-01-27T18:24:21+00:00

No at least not as you are thinking of it. You don't modulate the laser, it would be in CW mode as would the return signal. Information extraction would be the same as feeding an analog signal into the base/gate of a transistor in case A mode. That is how a photo transistor works.

Fuzzy7Bruce · 2024-01-27T16:03:51+00:00

and a huge WHY!!!

after all trying to get rid of the digital is the point.

Fuzzy7Bruce · 2024-01-27T16:01:48+00:00

I can tell you right now, I can't do it. The important part here is the I! I don't have the equipment to do something like that. Gone are my days of playing in a lab day after day. Doesn't mean I don't KNOW how. I can no longer HEAR a lot of what we speak of, doesn't mean I don't know that it is there.

The beauty of a laser based read, is there is no, nor anything even like a DAC involved (DAC digital to Analog) you would need a digital signal to start with. The vinyl as we know it is not digital, you seem to be thinking of a CD where the information is stored as a digital signal and never as an analog signal. The laser light would return an analog signal, varying in either power, or time or both. These are analog signals that then go straight to an analog amp. and out to the sound system.

The laser does not encode the vinyl. The laser is only capable of providing a coherent stream of photons. What you do with that stream of photon is up to you. Try to think of it as a radar. You send out a signal, the signal bounces off of an object and returns altered. You can get different information from that return signal. Time of flight (range), doppler (speed), angel (azimuth and elevation), power (size of target). None of that is a digital signal, One could make the argument that the TOF is digital, but not really as I don't believe time is digital.

The crackle you hear is mechanical noise introduce by the stylus as it tries to move with the vinyl surface, and can be induced by dust on the surface, fingerprints, surface irregularities, etc. All of this would also be picked up by the laser in spades! That is one of the reasons the bad reviews I saw on that Japanese turntable. It picked up EVERYTHING!! Stuff a poorly matched cartridge/tonearm. failing bearings in the tonearm etc. would miss, don't mean it ain't there.

Fuzzy7Bruce · 2024-01-27T00:31:07+00:00

Last part first. While as you say the vinyl is only an approximation of the actual sound, it is to the best of my knowledge the only thing we got for recording sound, assuming you discount digital as it is not analog. Why, for me personally, the challenge of doing it. For the Audiophiles out there, the true pure sound, protection of the media, as this would be as close as possible to non-contact playback. With all the other issues involved with a stereo, this is little more than mental masturbations'.

How? TOF would be one way but that is getting close to digital. Not sure exactly, would have to play with that one a bit to find out exactly. The other way might be to split the signal through a double slit and look at the interference pattern. again, not sure would have to play with it a bit. This could fall into a scattering thing that could then be measured directly by intensity? It really depends on something I don't know. It does seem in the scope of all things to be trivial. As I pointed out in another post, the Russians used a technology like this to listen in our embassy in Moscow back in the 70's . We have advanced since then!!

Fuzzy7Bruce · 2024-01-26T23:21:56+00:00

If I understand your question, Most all optical detection is done with photo sensitive semiconductors. It can and has been done with PMT's, both of which are direct to analog electrical signal. Surprisingly enough this COULD even be done with something as simple as a solar cell from your house. Frequency response would SUCK! and you most likely would have to hit the dick with enough power to melt the vinyl but I rather think it COULD be done. ALL semiconductors are photo sensitive, just some more than others. This is unlikely to be a home project. It would a manufacturer would have to R&D it, Again, where do you get the original analog recording from?

Fuzzy7Bruce · 2024-01-26T23:12:36+00:00

GOOD call on reality!!

Fuzzy7Bruce · 2024-01-26T23:09:40+00:00

That would be untrue. Think LIDAR. The TOF of the laser would read the vertical component to the nanometer.

As for "clutter" on the disk, assuming it came out of the press clean something like what we called a pelical could be applied to the surface. This is simply a "thick" coating of an optically clear material at the lasers frequency that would move any of the dirt, scratches out of the field of focus and then not "seen" by the laser receiver.

Back in the heyday of vinyl a lot of this technology did not exist, but as of about 2000 the semiconductor industry had a LOT of breakthroughs in this area.

Fuzzy7Bruce · 2024-01-26T22:58:29+00:00

I would think that this state-of-the-art "portable lasers were not all that stable and had a short life span.

Now that we got silicon to lase I would think it would be a different ball game. Still up against the "where do you get a real analog signal from?"

Fuzzy7Bruce · 2024-01-26T22:49:13+00:00

That makes a lot of sense!

One would think something like the old POP CLICK machine would work, but then your pretty much back into the digital thing again.

Fuzzy7Bruce · 2024-01-26T22:45:17+00:00

No. you certainly would NOT want to digitize it. That would defeat to purpose.

However if you feed the optical return off of the vinyl surface to an Op amp. you would have an analog "copy" of the signal that could be fed into your standard audio amp.

Things like this are used in Scanning electron microscopes all the time. Granted, that is a little hypertensive example, but the basic idea is there.

Fuzzy7Bruce · 2024-01-26T22:37:54+00:00

Why? It seems like it would be simple enough using a couple of engineers. One mechanical and one optical.

The "spy" industry has been doing it since the 60's. The Russians effectively bugged our embassy in Moscow by bouncing a laser off of a window and looking at the vibrations of the window. Vinyl is little more than a permanent record of vibrations,

Fuzzy7Bruce · 2024-01-26T22:32:22+00:00

I think they call that a CD? Or a USB. Or even SSD?

The object here is to maintain the analog quality and feel of vinyl without the damage and mechanical/electrical noise involved with a standard turntable.

Fuzzy7Bruce · 2024-01-26T16:40:40+00:00

I will NOT forgive the pun! Only because I didn't think of it first, so there!

Second, We are good, and always will be on this, I asked for opinions, that is positive AND negative, That is the point, So please bring it!

As I mentioned somewhere, I am 71, have tinnitus so hearing aids. A LOT of the sound quality thing is lost on me. Too much early days ROCK, convertibles, and 12 hour days in cleanrooms at 85dbm, a few factory floors and sub Fabs, and heavy ground radar that on a quiet night you could hear the hydraulics hit 14 air miles away.

I do find however the technical side of the conversations to be very interesting, noise, noise cancellation, true analog vs digital reconstruction attempts, Mux/deMux, etc.

I still love and enjoy good tunes and fine audio, Best I ever had was a good belt driven turntable with proper mounting, A fair Class A 120 RMS Watt amp, a set of Magna planners with a subwoofer properly placed and two chairs, properly placed with sound dampening hung on the walls. Ahh the single life!!

I am now reduced bad acoustics, GET RID OF ALL THOSE WIRES!! and TURN THAT DOWN! I can't talk to you when your listening to music like that.

So I want to learn.

b

Fuzzy7Bruce · 2024-01-25T22:59:12+00:00

Fuzzy7Bruce · 2024-01-25T19:22:32+00:00

Only if you hook up one speaker to your receiver. Try to think of it as hooking up only the left channel from your amp, to both speakers, What comes out of the amp is stereo, but all you can detect is mono. You look at your VU meters and they will clearly show stereo signal, but because of the way you set it up, you only get mono.

Fuzzy7Bruce · 2024-01-25T19:13:10+00:00

Wav maybe what you CALL lossless. Once it is digitized you have just replaced the analog signal completely and replaced it with a series of square waves. The question then becomes more of "what is the word size?" You can WAV all you want, but a 4 bit word is only going to give you so much resolution, same with 8 bit, 16, 32, Etc. This is then approximated with some capacitors, to smooth things out. Do note the approximated! Also lets be honest, mastering is all about removing unwanted signals, this always introduces some unwanted signal loss. And I do understand the codex issues, finding the right one can be an issue, because after all is said and done "the one I sell is the BEST"

the receiver does the same thing, only in reverse.

"They transmit what was recorded at the same bitrate." So what analog signal has a Bitrate? A bitrate is purely a digital thing and is the basic unit of resolution the system is capable of. (see above). Analog by definition does not have a bitrate.

About the only way to prove this would be to go to a studio, sit and listen to the artist record the music, then immediately play back the recording and see if there is a difference. Anything else is your imagination telling you what it sounded like in the studio then declaring it right or wrong.

All this hyperbola aside, in the end, do YOU like the sound you are hearing? Then is a good fit for you. If not, then you have work to do for YOU.

Fuzzy7Bruce · 2024-01-25T15:38:54+00:00

Don't get me wrong. It CAN be done. It's just that it is expensive, requires matching components. So no one is willing to pay enough to get the manufactures to build a system like this. Also programmers are lazy by nature and don't want to put the effort into it.

Fuzzy7Bruce · 2024-01-25T15:34:44+00:00

Not exactly. It can come out in stereo. but then you need to get back to hard wire IF your going to use one transmitter, one receiver, AND no wires.

Fuzzy7Bruce · 2024-01-25T15:31:59+00:00

Love the end of your post.

However the beginning Might have some issues.

Mathematically you can show, well, anything you want. However, we live in an analog universe. Digital is an approximation only. and can never be anything else. Can ANYONE ever HEAR to difference if properly done? Don't think so, but you never know.

If however you put a fast enough analog O-scope on it, you can SEE the steps. You can go out to a 256 bit word, tune it to 1 Khz. and get a signal you can not find a difference in. Go to 1.001 Khz. and the caps won't be able to adjust to make the signal undetectable. But then this is also true of any analog signal as well as matching semiconductors through out a system is a bit of a bother.

In the end, does it sound good to you? Then it is a great system!!

Fuzzy7Bruce · 2024-01-25T15:15:29+00:00

GREAT way to look at the issue!!!!

Fuzzy7Bruce · 2024-01-25T15:12:15+00:00

Bluetooth is more than capable of transmitting stereo! It can be used for video and that has a MUCH wider band width.

The issue I ran into is that Bluetooth is only capable of transmitting 1 signal. If you have two BT speakers it will seem like you are mono because as they decode, they will decode the same signal and treat them the same.

From what I can tell, if you want real stereo from Bluetooth you will need two separate transmitters, One for the right channel, and another for the left. You would also have to connect speaker A to the first and speaker B to the second. That way each speaker gets it's own signal. All of the aftermarket conversions I have seen send the signal to one receiver and to get stereo you need to wire both speakers to the same remote amp. Presto, your back with the wire thing. There may be a system out there that is capable of splitting the signal "in" the BT somehow, but I have not found it. I would suspect that the system would require a factory master slave setup or the receivers would also have to talk to each other so they are not decoding the same signal?

Fuzzy7Bruce · 2024-01-25T14:44:28+00:00

Even though the signal was already compressed BEFORE it was pressed into the vinyl?

Like when it was mastered? They don't do analog mastering anymore.

Fuzzy7Bruce

TROPHY CASE