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chrismedr

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Everything posted by chrismedr

  1. similar from the german virologist I mentioned, he estimates from all the studies that are out of the moment that surface transmissions might account for about 10% of the total infections. so definitely worth to keep an eye on that, but it seems that it needs quite a high dose to be infective over surfaces. btw, he estimated the rest of the infections coming half from aerosol transmissions (very tiny particles from normal breathing that can accumulate over time in the air in small rooms) and the other half from tiny droplets from coughing or wet speech. having enough fresh airflow can help against the former and keeping some distance and wearing a mask about the later.
  2. well, it‘s hard to know for sure how long you have to wait for objects to be harmless, but so is how much alcohol, soap or UV light you need to be 100% sure. that said, the one source I personally give a lot of weight, christian drosten, was discussing the 72h number in the NDR podcast, and he said that comes from a study which is not modeled to reality (way higher initial dose) and they didn‘t measure if the virus was infective, only that it was there. he estimated that on normal surfaces after 8h there will be such a small amount of virus left that it will not be contagious anymore, so personally I‘d feel safe with 48h - or at least a *lot* safer then with a pocket sized UV box for 1 minute. but unfortunately we‘ll only know for sure in a few months, at the moment all we can do is trying to reduce risk yeah, it's a lot of money in times with little income. but to me getting cheap wipes for free which destroys the lavs sound more expensive in the long run.
  3. One way would be to get more spare lavs: use set A on monday, put it in save storage and use a completely different set B on tuesday, set C on wednesday. Then on thursday Set A again, etc. (Store the lavs in a way they can dry while in storage) you‘d need 2-3 times as many lavs as normal which is a significant investment, but on the other hand you should be good for a few years afterwards, and it‘s probably cheaper then destroying the cable with alcohol.
  4. that's an interesting aspect I wouldn't have thought of, thanks for the story. true, seems sometimes like nobody reads them. to be fair it might be that in this case the guy just got handed some sound samples to evaluate and didn't get to see the sound reports when making his calls.
  5. I don't have the knowledge to draw meaningful conclusions here, but one thing I can mention from similar tests I did, is that that preamp noise can also be a factor. afaik the MK41 needs quite a bit more gain then the MKH50 for example, so make sure that you use *very* good preamps if you really want to be sure the test is about mic self noise (out of interest, what was the preamp/recorder btw?).
  6. to me 32bit float recording for ISOs is pretty much a no brainer once the technology becomes available and post pipeline supports it - I very much expect it to be the norm in about 5-10 years. just imagine for a moment that we all were used to record the full dynamic range of any audio source and somebody came along and said: "that's a waste we don't need that, lets just clip the audio at some arbitrary level based on what we think will be the loudest noise in the scene. oh and for good measures, lets throw in some distortion mechanism just in case it happens." the downside of float recording of course will be: - more and more people will think they can do a good job at sound recording without understanding the nature of audio - films without proper post for audio will have way to high dynamic range and levels all over the place - films will not get any better because of float recording not sure what you mean here, like recording at the boom pole without a cable to the mixer? sounds like having a blind pilot flying the plane, not a terribly good idea (not to speak of all the extra work in post that this would cause).
  7. I don't deal with long range antenna stuff myself, but I see this problem for example: Imagine my receivers are on set, then SDI to cart 50m away from set. Now I have a RF problem and need to switch channels on the receivers. so I run 50 to the set, swap channels, run 50m back and check audio only to find that it didn't solve the issue. rinse and repeat : )
  8. I know little about these units, but wouldn‘t another option be to use the cheaper receiver and use the analog out to the camera xlr in? not as neat as the hot shoe, but more reliable i figure. And if I were to spend over 4k for a camera hop, I‘d definitely look into other options with better audio quality and that can also be used on other cameras. just some thoughts
  9. Not sure if this got anything to do with this thread but just seen this: https://nofilmschool.com/lectrosonics-dpr-plug-secure-audio
  10. A digital output alone would not be of much benefit for the float recording of the mixpre as the signal has already be limited in the transmitter. the problem is float would take up more bandwidth on a wireless signal (plus require a full digital transmission and output interface supporting float). not many transmitters will even do uncompressed 48/24, and adding 32bit float would demand 50% higher bandwidth. so better to run a wire, of that is impossible use quality transmitters and mics and take care of proper gain staging.
  11. The nature of DIY is that one spends a lot of time of researching and tinkering until things work exactly as planned (unless one has a lot of prior experience). it seems to me that you worry too much about a lot of things, I suggest you re-read this thread again, and then make a decision if you want to go the route with mini-bnc or full size plus adapter, then crimped or presoldered bnc.... and then simply try it : ) or if you are worried you can‘t pull it off just spend the money to have it made.
  12. Also the HD-25 for me. It's not really neutral but a pleasing detailed sound. One of them is beginning to start having a bad contact on the fork. I've heard of others that solder the cable for a permanent fix (I seem to remember Kortwich does that too). A very nice alternative is the Beyerdynamic DT 240 Pro. It's more neural and very affordable and also quite compact. The cable is a bit long but can be switched (2.5mm jack connector at the headphone side). Don't know how well they hold up in field use since I don't have them for very long. Also tried the 7506 for a while, didn't like them very much.
  13. great, that includes the gain I assume?
  14. I think we're missing part of each other points (as so often on online discussions) I was talking about local patents. why would a company which sells locally only to Australia search the database of german (or any other countries) patents? And how should I as a single person (even a professional) have a chance to make sure that things I buy in Australia don't have any tech that is copyrighted in Germany built in? As you say the only way would be not to buy any products from outside my home country (no electric toothbrush, no watch, no photo camera etc). to me that sounds very strange, and I want to believe that our justice system is sound enough that if I get caught with said toothbrush, I will not get arrested unless it's obvious that I'm involved in a conscious fraud. I agree with most of your post though and it's well possible that my toothbrush will get confiscated if the local patent holder can prove that the model in question can't be legally used in Germany. sorry for straying so much off topic... I think most of us agree that in the specific case of the Deity transmitter is quite clear that one can't legally sell it in the USA (or rather, one would risk an rather expensive legal battle with questionable chance of success). It's still not clear to me if one is legally forbidden to *use* one in the USA - say I'm making a documentary produced in Germany and we fly over to the US for a couple of days. Am I allowed to bring my recording transmitters? I sure would find it odd if I couldn't, but stranger things have happened in the international legal system and I guess only a very specialised lawyer could tell for sure.
  15. as other have mentioned I think you're mixing things up. obviously if company B copies the coffee grinder of company A nearly identically, that's easy to spot, and border controls can hold these products up and even destroy it (I know of a chinese counterfeit labeled back bag that was destroyed when the buyer wanted to pick it up). I was speaking of an example involving a coffee grinding *mechanism*, so the machine could look completely different but something hidden inside of the machine B could possibly (or not) violate company A patents. maybe company A is not even aware of company B, and vice versa because they are on completely different markets (ie. the Australian maker never planned to export to Germany and never bothered to check their patent database). I agree that it's also a question of ethics, so in this specific thread case we *do* know that there is a previous US patent and that it most likely also applies to this new transmitter. However, there could well be cases where it's impossible to know for me personally if an item that I bought abroad could violate any local patent claims if brought back (both because I don't know about the specific grinding mechanism, and even less if that patent is enforceable at all or invalid) .
  16. so what you are saying is, next time I buy something abroad, I have to check every possible related german patent to see if I could possibly infringe some local patent? sounds rather impractical (or rather impossible) to me. what's more, even looking at the local patent database, all those patents are just claims, and it's not sure if they are justified and will hold up if challenged (this is from reading up 2 hours on patents for a personal project idea). meaning maybe a german company A claims they have a patent on a specific mechanism of grinding coffee, and the australian manufacturer B might not to sell a machine with a similar mechanism here in Germany, because it's too much risk/hassle. But how would a border police guy know from the patent file and looking at the coffee machine if this claim is justified or not? It's possible that I can get sued by company B if they find out I imported the coffee machine, but until things end up in court nobody would really know if it's legal or illegal to import the thing.
  17. well, those are not fake products or rip-offs, those are perfectly legal genuine products that if they bought outside of the USA have an extra feature enabled. As everybody here I'm not a patent lawyer, but I find it hard to believe that if I get granted a local patent here in Germany, I can forbid everybody to enter the country carrying a device that might violate this patent. I mean, how would that even work? If I visit some friends in Australia, buy a coffee maker with a cool grinding mechanism there, would I have to check if this grinding mechanism violates any German patent before I return? Not only is this impractical, but totally impossible for a single person to check all foreign bought items agains the home country database of filed patents. Now, if I want to import said coffee grinder commercially and sell them here in Germany that's pretty certainly going to be a violation. just some thoughts chris
  18. I know errors happen, but a manufacturer of technical sound gear should really double check before correcting somebody on the speed of sound. 343 m/s * 0.019s = 6.5m (at 20deg C) still, congrats for the BP-TX-2 ; ) and while you're here, could you clarify if the unit can record from the USB-C as an audio input?
  19. and a cam hop transmitter the same time
  20. nobody knows for shure, but christian drosten, one of germanys top experts (he‘s been researching SARS type corona viruses for like 15 years) says it‘s very unlikely that we dont get any immunity after an infection and that reports of reinfection are most likely a result of testing methology. unfortunately it seems also possible or even likely that the immunity will fade after a few years, but it might still result in less severe illness. chris
  21. That makes me seriously want to pick up an M2D2 even though I have no immediate use for it : )
  22. Would be strange if inputs 4-6 on a 633 were mic inputs with preamps padded to line level without the possibility to use them at mic levels. then again, stranger things have happened on this planet...
  23. What happens if you switch over the cable from a Teradek that is unproblematic to one that is problematic?
  24. chrismedr

    Jay Rose

    Very sorry to hear this. I always enjoyed Jay's post, so much theoretical understanding and real world experience at the same time. Rest in piece!
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