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About Bouke

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    Hero Member

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  • Interested in Sound for Picture
    Not Applicable
  • About
    I'm a developer of software tools, both ''off the shelf' as custom work.
  1. NEW: Timecode Systems | UltraSync One

    It is probably 100% sync. You can also switch to another format and stay sync. BWF does NOT have timecode, but a timestamp. (48000 samples per second. And a second is a second in all framerates. Calculating that to TC in NDF or 23.976 does give other TC values, but that has nothing to do with sync.) LTC does have a framerate baked in, but a reader will look at the sync word at given time, then calculate the TC belonging to that and calculate the timestamps. (Hence LTC lock is way more accurate than one would expect.) Bouke
  2. NEW: Timecode Systems | UltraSync One

    This is just adding pulldown. So the FPS is 29.97 (frames per second), but since pulldown is added, it's interlaced making it 59.94 fields per second. These cams are steam powered afaik. (The trick was invented to shoot 23.976 on tape that could not hold other framerates.) Bouke
  3. NEW: Timecode Systems | UltraSync One

    I'm just reading this thread for a way different reason, but this is just so fucked up... (Yes, of course sound lines up as there is no speed change anywhere, but the image will be severely damaged.) Bouke
  4. Oops, my bad. You're totally right of course.
  5. Well, If I don't know the fps / sr / amount of drift over what period / if the drift is constant or not, I'd rather not guess what is happening :-) Depending on the amount of footage, I think we all would have fixed it in less time than guessing here :-)
  6. Hi Bash, Well, it's not that if you load a 48.048 clip that it will play at a different rate. It will play at 48.048. BUT (And that is what is happening in our world,) if you record at 48K and THEN flag it as if it was recorded at 48.048, then it will play at a different rate. (Same as shooting slomo, high framerate, tell player to play at normal rate.)
  7. Eeh, Bash.. Since when has sampling rate something to do with drift? (Unless someone changed the sampling rate indicator while not re-sample, thus changing the duration of a clip...) As Nick explained, drift occurs due to non-precise clocks / lack of genlock on long takes.
  8. I'm an editor, and yes, I DO want roomtone. (And want to know where it is.) My work is mostly doc style. I often need 5 seconds to cover / fix an ugly cut, and almost never that can be found in the footage close to the takes used. (I can imagine that's different with drama, but I don't do that.) I don't buy the time it takes on set. Do you know how much time it takes for me (and the director if he's sitting in.) to go to hours of footage to find a tiny piece where everyone shuts up? And then have to loop 4 frames to get 'something' ? It's annoying at least. I don't have a large library of this kind of stuff, I just need to be able to add a pause during spoken text, add tone to a cutaway with no dialogue, that kind of stuff. For what it's worth... Bouke
  9. Underwater Mics

    Mechanical only would work if the membrame is very heavy, and that would make the mic useless in air :-) Frequency I don't know, but I would think that the speed of sound in thin air is the same as in normal pressure. (The sonic boom happens at the same speed no matter the altitude of the plane.) Bouke
  10. Underwater Mics

    I don't know anything about this mic as I'm a software developer / editor, but out of curiosity: How can a mic receive audio in a vacuum? (I know in space it's not a problem in the movies, but this is earth...) Or is there enough air left to carry the sound or does this work on another principle? Bouke
  11. Zoom F8

    You mean, the same framerate is meant, but they are NOT the same. (I do math with these numbers, and if you use 23.98 instead if 23.976 eg for a correction on the duration of a file, you WILL be off. (That once took me a couple of days to figure out.)) In NTSC framerates, the video is slowed down by 0.1 % So on 23.976 the math is 24 * 1000 / 1001 = 23,97602397602398 that is NOT 23.98 If you use 23.976 you'll be in sync for a long time... (I can calculate how long your show has to be so you would notice that number is not accurate enough either, but this is already over the top :-) Bouke
  12. Cuban Sonic Spying?

    Well, I for one believe the government puts something into the water that makes us believe in conspiracy theories.
  13. Audio LTC Framerate conversion?

    I would suggest you pass it on with a warning on what happened, so the guy after you has a clue....
  14. Audio LTC Framerate conversion?

    As others have pointed out, there will be no offset, and there is no reason to be afraid of manual syncing. However, it's possible that the software for reading the LTC will flag the TC as 25, thus TC display is off. That's an easy fix, and it hightly depends on the software / settings / workflow if it will be a problem. (I know for sure that my AUX TC reader will handle this just fine.)
  15. Delivering files from multiple recorders

    No, you don't but I can imagine that Nick does something different. (Rolling long takes with his master setup, where some body packs (not master) roll short takes, and might NOT overlap the master setup.) Nevertheless, it now copies / patches all the files, no matter the overlap, and it will set patching correct, and will put everything in the ALE / Sound Report. I've also added warning colors for custom patching / double channel patching. So, new version on my site. There will be more to do. I've got testclips from what I think is a steam powered 844, where chunks are un-even sized in the chunk size, but padded with a zero. (so current version refuses to load them...) That will be fixed tomorrow... Another thing, how do you add comments? Do you have a keyboard attached? I could make something that someone else creates a file during the shoot that can be merged with files so you don't have to worry about that.