Technical Reference
262 topics in this forum
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- 3 replies
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Hi, Recently on a shoot the time code on my SD 633 kept resetting to 0.00 every time the machine was powered off. Even though i had entered the time of day and jammed the camera. Not sure why as usually it holds it for the day. Anybody know what might be causing this? Or rather how I guarantee it stays..
Last reply by Symbioth, -
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- 23 replies
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CAT-5e cable for portable applications: (pre-chewed but not inhaled: researched but I have only a little reliable field feedback) To distribute SD video and audio for Video assist purposes this paper is much too complicated but CAT5 is good enough. Quality is secondary to convenience and cost. Go to Pac Radio and get what they have on the floor. You do the sales people a favor, they will make their quotas and get their commissions, forget all this research stuff. Anyway read on you geeks: Cat-5 solutions are for analog component video and audio signals through cheaper lighter weight Cat-5 cables were the best quality is not so important. Cat 5 was originally mad…
Last reply by studiomprd, -
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- 5 replies
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[edited for clarity] Hi Guys, I am getting no love from the manufacturer or the distributor of the microphone, so I am forced to ask here. Has anyone successfully terminated an OST TL40 for Wisycom systems? My best guess would be to wire it for the "2 wire + bias" setting on the wisycom Tx, however I'm suffering a little bit of a mental block over the supply voltage available. The manufacturers spec lists the nominal supply voltage for the TL40 as 1.2volts, the wisy's offer 5.5volts - should I be looking to wire in a resistor or will the mic operate happily with a 5.5v supply? There is no maximum supply voltage offered by the OST on their website and they were…
Last reply by SeeKai, -
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- 1 reply
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The left channel is interrupted once for 250 ms every 4 seconds. 250 ms later the right channel has two interruptions of 250 ms spaced by 250 ms. Graham's Line Ident Tone System (GLITS) is a test signal for stereo systems devised by BBC TV Sound Supervisor and Fellow of the IBS Graham Haines in the mid 1980s. It comprises a 1 kHz tone at 0 dBu (- 18 dBFS) on both channels, with interruptions which identify the channels. This arrangement has an advantage over the EBU stereo ident tone in that each channel is explicitly identified as belonging to a stereo pair. The EBU Technical Document Multichannel Audio Line-up Tone (Tech 3304) defines stereo lineup tone has havi…
Last reply by mikewest, -
- 3 followers
- 11 replies
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Something has been bothering me for a while. So I have done some crappy, quick turn around jobs. You know the type - A Simple Boom and Lav shoot. The turn around is quick and the editor doesn't even bother with a simple sound mix, because it was shot on a 5D and they spent all their time syncing. The final videos sometimes don't have the audio tracks center panned. The boom is on the left and the Lav is on the right and it just sounds ridiculous. It makes me ashamed to have my name in the credits. I remember that I got a complaint about this a few years ago from an editor. He didn't like that when he brought my sound into his NLE (FCP7 at the time) he had to manu…
Last reply by Jan McL, -
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- 57 replies
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A quasi continuation from my other recent posts. The hits just keep coming; let's talk levels for a moment. I've gone through the audio for the first couple days and the levels are pretty low around -42 to -30db and occasionally peaking around -24db. This is occurring for both the boom and lavs. From my understanding the levels should be around -12db? I'm not just talking about Wide shots where the boom can't be near the actors either, the same thing is happening in Mediums and O/S, and it's not framed in some artistic way, the players heads are near the top of the frame, so the boom mic if placed properly should be giving a pretty strong signal and I imagine the l…
Last reply by Glen Trew, -
- 15 replies
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Hello, just got a report back from editors saying that -20db tone on the files is playing back at -15db when imported into tbe avid - as a result they're saying the audio is a little hot. question is, is this on my side somehow? I'm using a 788t and ad 256. Thanks J
Last reply by Ze Frias, -
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Hello, I want to do a mod in the direct outs of my CS106, like the one Vark Audio offers. The problem is that I live in Ecuador, South America, and sending the unit to them would be a little difficult. So I contacted a local electronics engineer and he told me that he needs the service manual, because the diagrams in the operators manual that I gave him don't have all the information he needs. Does anyone have the service manual of the CS106 or know where to find it? I sent an e.mail to coopersoundsystems@gmail.com, but they haven't answered yet. Thanks. Juan
Last reply by Mirror, -
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- 1.1k views
Hi there, I'll soon shoot a documentary in Scotland, and I was wondering if I could be able to use my Block 21 Lectrosonics wireless lavs without being "illegal". Could anybody help me on that? Much appreciated!
Last reply by olivierhoude26, -
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Kinda of curious, I have here a dead Switronix NP-L60 li-ion, no juice! I was wondering because I was unable to find any links pertaining to replacing the cells on this unit or what type of battery's.. Anyone every here replaced the cells on the NP-L60?
Last reply by Nicholasfargone, -
- 1 follower
- 11 replies
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Can anyone advise on making a cable or project box that can step 18 down to 15 volts dc? I am looking to power a euphonix mc mix (requires 15 vdc) from a PSC powermax (wired to provide 18 vdc out). Thanks Greg
Last reply by Ken Wilkinson, -
- 20 replies
- 85.8k views
Hello, I've been given some dailies and I see the audio has been recorded at a sample rate of 44,100/32 bit. Now I thought the minimum one should record audio is at 48,000 khz. Thought this was industry standard? With it being recorded at 44,100, is that bad? How big of a quality difference are we looking at vs 48,000? Does the fact that it was recorded at 32bit, make the 44,100 superior to a 48,000 recorded at 16 or 24 bits? Thank you
Last reply by afewmoreyears, -
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I have a Tvc shoot this Sunday where the frame rate will be 33.33FPS. What is this? I usually record at 25 or 24 and I'm a bit stumped as to what to set my 744T to? I have never come across this framerate before and the 744 obviously has no setting for it. .. Would 25 on the 744 do and they will fix it post? Or better to change the FPS to something else? Thank you
Last reply by Tom Conen, -
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Hey all, I want to send 5 volts continuously down the "positive" leg of a Canare Star Quad cable. I'm assuming that is completely fine as Phantom power would be sending 12-48 volts. Phantom Power sends a continuous charge at a higher voltage than I'm looking to do, so I should be fine...? Maybe the info is in front of my face when I check out the Canare Star Quad specs: http://www.canare.com/ProductItemDisplay.aspx?productItemID=53 But all I see is that Star Quad has a max voltage of 500V AC and at only 1 minute. I want to continuously send 5 Volts of DC. This is for a remote control, but I would like to use Star Quad cables so I don't need a dedicated c…
Last reply by Rick Reineke, -
- 1 follower
- 4 replies
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Fine people of the internet I pose this scenario to you: I own a MOTU Traveler MK1, not MK3. It claims it will "resolve" to SMPTE via any audio input and send out SMPTE via any output. The software it ships with, the MOTU Firewire SMPTE console, controls all of the SMPTE options as you'd imagine. The frame rate selection does not include 23.98 fps but only 24, 25, 29.97 DF/NDF or 30 DF/NDF. Digital Performer 5 also has this same limitation as does my older version of Nuendo. I also own a 664. I have jammed the Traveler from my 664 at 23.98 fps and it seems to hold sync for an hour or so in my brief test when the Traveler is set for true 24 fps SMPTE. I have ye…
Last reply by Philip Perkins, -
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- 30 replies
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I have considered getting 1 Lav for a noisy location with a presenter direct to camera where the lav can be visible, perhaps a cardiod pattern lav but only if the presenter is directly addressing the camera without a sweeping arm gesture and head turn. After this week I am considering something else: I recently had to use the VT500 single lav in a supermarket using Lectro 411 unit. Background ambience faded way to the background much more so than many other lavs I've used. And later that day, two separate provided lav models on 2 talent on-camera together using Lectro 411 units. -A white Voice Technologies VT500 -Lav Mic which was for a broadcast TV talkshow segm…
Last reply by Constantin, -
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- 1.6k views
Wanted to see if anyone knows of a good playback app for I phone?? I have used audio loop, but it won't work with the new Mac OS ...
Last reply by GrahamTimmer, -
- 1 follower
- 4 replies
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MP3 - timecode in ID3 tag? I've googled pretty extensively to find some more information about this, and what seems to be the main reference site - ID3.org - seems to have puzzlingly been down since 2012? So I've not made any progress. Can anyone refer me to or know more information about where and how timecode is placed in an MP3 ID3 tag such that transcription houses can use it please? There seems to be a wide variety of ID3 tag readers and editors but timecode reference seems to be outside of thier scope. Anyone know of one that can read or edit the timecode reference please, I couldn't find one? I know BWFWidget Pro can create MP3's with timecode in the I…
Last reply by pindrop, -
- 3 followers
- 55 replies
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...or at least we should know them, or learn them, as they keep coming up! for example, we keep getting asked about interference issues amongst transmi9tters and receivers: "Desensing or receiver desensitization: Desensing occurs when a transmitt er is operating in close, physical proximity to a receiver, even if that transmitter is not on or near the receiver’s operating frequency. Receiver desensitization occurs because receivers must maintain critical voltage and current levels throughout the frontend stages and a strong (i.e. physically close) transmitter can cause these levels to vary greatly. As these levels widely fluctuate, the receiver performance will…
Last reply by Wandering Ear, -
- 3 followers
- 14 replies
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<<Question: I need to setup multiple receiver antennas in four separate studios as well as outdoor antennas for "man in the street" interviews. I want to have eight receivers in a central equipment rack to keep my life simple and I want to combine the remote antennas into as few coaxial cables as possible to save on cable costs and installation. Can I do all this with antenna combiners, splitters and amplifiers?>> We get questions like this about once a month at Lectrosonics. Combining receiving antennas from multiple locations is not trivial. Most of the multiple antenna systems are "saved" by the fact that the distances from talent transmitter to the re…
Last reply by jayhartigan, -
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Can anyone help me with wiring an Audio Technica PRO-35 mic for use with a Lectrosonics LMa transmitter? Any help would be appreciated. Thanks in advance, Robert
Last reply by Jon Gilbert, -
- 2 followers
- 24 replies
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Hi all, Did some search and couldn t come up with any suitable answer. Video monitoring creates a delay between sound and image that makes judging proper lipsync on music video challenging when looking at monitor. I ve used simple technique to guesstimate delay with a slate listening to my erx ifb but i d like to have a way to have a proper time measurement? Filming fs700 hdmi to hdmi to sony monitor guesstimate gives me around 80ms. Any ideas? Cheers!
Last reply by Philip Perkins, -
- 19 replies
- 4.1k views
Hi all, Before Nomad officially arrives to Sg, I got myself a Zoom H1 because my Zoom H4n went robust!. Unfortunately for me, the line input doesn't seem to match with my SD 442 XLR - 10 or Line Outputs! The only output that works now with the H1 is the Tapes out on the 442. I know it has something that got to do with the Line Input on the H1 and XLR Output level because I managed to get the XLR outputs on my 302 to work after padding it down to -10 Line. any idea how do I go around solving it for the 442? Put some resistors in the 1/8 - 2 XLR cable that I had made maybe?
Last reply by jrd456, -
- 4 replies
- 1.6k views
i have a venue receiver with a VRT installed (all current firmware) when i go to 'Detect' on the venue i get a '?' on this channel. its not the frame, it follows this specific VRT module.. now i can assign it to be block 20, which it says it is on the VRT, but the frame cannot detect it. anyone know why this is?? could it be a VRS module which might have been tagged accidentally a VRT??
Last reply by thirdoctave, -
- 6 replies
- 3.5k views
I am having issues with setting the level on this camera. pmw-F5-CineAlta- 4K camera The meters don't show decibels. You can change the audio in the menu but it seems when I go to -20 it's lower than zero but setting it at Zero seems to low. any help with this would be great. Of course I am on a shoot right now and any info someone can help me with would be great! Thanks! Marla
Last reply by John Blankenship,
