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Sound

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About Sound

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    Germany
  • About
    I am a videographer and always concerned about audio.
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  1. Thanks! I checked everything again, but its still the same on my recorder: "Audio Delay" delays ALL audio. Analog input as well as HDMI Input relative to video. I asked atomos once and they told me it would be to complicated to build a delay for audio channels relative to each other. Did you try to set the audio delay very high for example to 40 frames and see what happens in the recording? For me the workaround is to set Audio output on the sony a7 to "Live" instead of "Lip Sync" so that the audio from the camera is earlier than the picture in the hdmi stream and then compensate both the analog audio in the ninja and the hdmi audio of the camera by one frame. Problem is: The delay of the picture in Live mode varies depending on framerate and resolution, so it can work in one setting and in another there is a delay you have to correct.. Here is the picture with a delay of 40 Frames of my timeline just using a clapperboard every second or so. Analog input should be on 1 and 2, My Lav Mic on 3. As you can see, its not a 40 frames delay of the audio tracks relative to each other, its just a 40 frames delay of all tracks relative to the video. Can you send me your results as well? It would be very interestig if they have fixed that in newer recorders, i bought mine one year ago and updated the firmware.
  2. Exporting all audio from an Avid autosequence and reimporting as one big audio file befor clipsyncing seems to work. But the audio drift is still the same, I just can use clipsync - thats a big advantage. The problem is: I have to convert to 24 bit, as avid has no option to export 32 bit, but the advantage is that I dont have to link to the audio anymore and I can import it properly.
  3. I have to correct. Even in 30p (or 29...) I have one frame difference in avid where the recording restarted. With Wordclock its still the same. I can only try to create an autosequence of all audio and then export all the audio as one file, then reimport and clipsync. It will be a big file, but thats not the problem.
  4. Thanks! I will test it. I just tested the Mixpre 10 II in 30p. Everything perfectly file, no frame overlap, everything syncs up in resolve as it should. I can sync two audio clips to one video file without problems, its just a bug in 25p. I will try it out with wordclock, maybe that forces the recorder to stay in sync even in 25p..
  5. Then maybe they updated the Ninja v. When did you buy yours? It's nothing in the settings. There is only one single delay setting and that affects both.
  6. Problem is: the editors are permanent employees, I am a freelancer.. so no chance discussing anything.
  7. The problem from the last one frame delay in the edit room I talked about was not about the mixpre. The last time it was an atomos ninja v, which can record audio from the camera HDMI plus analog audio in. There you cannot set a delay of the HDMI audio and analog audio in separately. You can only set delay for ALL audio. I was filming at a different framerate this day there was a delay in some of the analog audio tracks. The editor didn't notice until he almost finished the project and didn't know what's going on or if there was any audio drift. As nobody talked to me I couldn't help them and tell them that it's a constant delay in some tracks. But the same problems can come up if the manufacturers don't communicate those problems. If someone finds out late in the edit stage and the editor isn't very competent, the YOU have a big problem. I bought the mixpre 10 II to work around this problem. I work as a one man band shooting documentaries for television and want to run the recorder a long time, 32 bit Audio is a bit more forgiving if you don't have time to adjust the levels because of the headroom. Then I am shooting with a small camera. But then I will always hit the 37 minutes several times because I will not stop the recorder every time. Very often I am in the editing room as well but when I just hand my footage out to an editor the problems start. That's why I mostly try to sync and transcode before handing out my footage. For me it's very important that the manufacturer always informs everyone when they know about such a problem. I told them. But they needed someone to blame. after that I just refused to work for them anymore. But what I am saying: I need to trust my equipment 100 percent because it can always cause problems if you find out too late. I thought that's the reason you pay so much for your sound device products. Because they are reliable.
  8. Or they were just to slow and needed a reason to get more time. I know that it's very easy to correct, but if they are complaining you don't have any chance to discuss that.
  9. The issue is: you need competent editors for this. I delivered footage for a television station. It was five hours of footage and the audio had a delay of one CONSTANT frame. They told me they had to book two additional days for an editor to correct that. This sounds ridiculous but they are not used to do any corrections. And in the end everything is always your fault. I cannot imagine what happens when I deliver footage with a DRIFT of one frame..
  10. I connected an external Recorder, Ultrasync one. So I set it to output timecode to the ultrasync one first (25p). After that I set it to take the timecode from the ultrasync (25p). And then i created an Avid Media Composer project, because I need to sync video and audio. Video is fed into my small Sony Alpha camera via Minijack Audio LTC. As Media Composer cannot create an AutoSequence by Aux Timecode and is not able to convert AUX Timecode to Starting timecode of the clip there is no way to create an AutoSequence. The only Option is ClipSync, but that results in 1 Frame files as the timecode overlaps. I can convert Audio Timecode to Clip Starting Timecode in Davinci Resolve - Then export the video file to avid and then do an AutoSequence in Avid. Syncing one Video file with the two audio files in Resolve doesnt work as well and there is no real AutoSequence function in Resolve. Only a Multicam function. Its a shame. The mixpre 10 II isnt a very cheap recorder, but it only records polywav with 4GB limit and has massive timecode issues.. So all in all its really not usable.
  11. tried to sync it up in Avid. As these files are split automaticall after 37 minutes I tried to sync two audio files to one video file. But the result was one frame with 22 Audio tracks. so the Audio Files were overlapping by one frame. As I asked Soud Devices they told me they already know that there is a lag of one frame after about 15 minutes in 25p. It's not the recording, just the timecode. I already installed the newest firmware. I cannot believe that they dont warn their customers as this can bring them into serious trouble.. I will try to find out if the same problem exists with 30p. Here is the message from sound devices: Talking with my colleagues, there is a 1 frame delay after 15 minutes that we're looking into. I can't say when we'll be releasing firmware for this but it is being worked on!
  12. Hmm. So how can it be possible that the problem only exists in 25p? At least sound devices is saying so. Does it make any difference which framerate I set in the recorder?
  13. I tried to sync it up in Avid. As these files are split automaticall after 37 minutes I tried to sync two audio files to one video file. But the result was one frame with 22 Audio tracks. so the Audio Files were overlapping by one frame. As I asked Soud Devices they told me they already know that there is a lag of one frame after about 15 minutes in 25p. I have opened a new topic in the equipment forum. I cannot believe that they dont warn their customers as this can bring them into serious trouble.. I
  14. Thanks. I just found out mixpre 10 II has Timecode jumps in 25p. So it's unusable for Timecode sync. I wonder why the sound devices guys don't warn their customers.. that can really destroy a production.
  15. I just bought the new Mixpre 10 II from Sound Devices but I found out that there is a Jump in Timecode of one frame after about 15 Minutes. The Team from Sound devices answered my mails very quickly and confirmed the error, but they dont know when there will be a fix with a firmware update. Its the same problem when running on internal clock or feeding external timecode, so the Mixer seems to be totally unusable in 25p. Does anyone have the same issue? Does anyone know a workaround? Shouldnt Sound Devices just warn their customers about that issue? I asked them several times to warn everyone as these issues can really ruin a production and a lot of custiomes rely on sound devices producs. I think such a massive problem should be communicated to everyone.
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