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Posted by Joerg Niggemann (Member # 611) on June 10, 2006, 07:01 PM:
 
Looking for a cheap solution to sync the GS1200 to a DVD soundtrack, I found that a 25 Hz square signal which is played back on a PC's sound card and directly provided to the projector's ESS input via "line out" will keep the GS in sync perfectly. Sync signals for every speed (16 2/3, 18, 24, 25 fps) can be generated with nearly every sound editor program.

I just did a re-recording of "North by Northwest" and used the PC as crystal sync source and for audio/video playback with Adobe Audition. The GS then starts and stops under control of the play/stop buttons of the audio editor program. The possibility of setting cue points within the audio track is also very convenient.

Joerg

 -
 
Posted by Jan Bister (Member # 332) on June 10, 2006, 07:31 PM:
 
Joerg... that is a BRILLIANT idea. Using a PC's sound output as a sync source by simply playing back a square waveform... I can't believe nobody's thought of that before. Only issue I see with that is that you'll want to set the playback volume just right so the ESS input on your GS-1200 can read the signal reliably (on one hand) without being overloaded (on the other hand).

But that is simply brilliant. Well done! [Smile]
 
Posted by Kevin Faulkner (Member # 6) on June 11, 2006, 06:40 AM:
 
Joerg, Didnt know that was possible. Please, please give more detailed info. If the original DVD was say NTSC would it then chuck out a 23.97 pulse?

This could be the answer to a few problems I have had recently. Some UK discs are actually made from NTSC masters and wont pulse sync at 25fps.

How do you get this from the soundcard to the ESS input?

Kev.
 
Posted by Joerg Niggemann (Member # 611) on June 11, 2006, 06:44 AM:
 
Jan, there was no problem adjusting the sync pulse volume. First, I set the "ESS level" on the GS to center position, then adjusted the 25 Hz volume on the PC soundcard according to the GS's "pulse meter scale". If you do the sound recording from a DVD player, you can forget the PC from that point and just set it to play the 25 Hz in a loop, because it only acts as crystal sync source. When using the PC as playback source for the soundtrack also (as I did), I must admit that I used 2 soundcards, one playing the 25 Hz signal with a fixed volume, the other one for the 2 language sound track.

Kevin, sure you can generate a 23,97 Hz pulse, I checked that with Audition. The GS will follow that frequency. To feed the pulse to the GS, you can directly connect your PC's line out left or right to pin 4 of the ESS DIN input, and line out ground to pin5 (I made an adaptor cable 3,5mm --> DIN).

Joerg
 
Posted by Flavio Stabile (Member # 357) on June 25, 2006, 03:05 PM:
 
Hello!

Could someone tell me how to create the audio signal we are talking about? Which software to use?
I already own the Pedro sync box and runs perfectly, but I'm very curious about this other method, especially for the NTSC frequency my box doesn't support.

Flavio
 
Posted by Jan Bister (Member # 332) on June 25, 2006, 10:03 PM:
 
I would assume that all one has to do is create a square waveform in any audio editing software of your choice, then play it in an infinite loop... getting the frequency right would be a matter of "padding" the waveform (i.e. adjusting the number of samples contained in the waveform) so that playing it back at a 44100Hz or 48000Hz sampling rate would result in a precise 25Hz (or 23.976Hz for NTSC).
 
Posted by Dan Lail (Member # 18) on June 25, 2006, 11:43 PM:
 
Joerg, this is a fantastic idea. More details please. Maybe a diagram for the not so computer oriented like myself. [Smile]
 
Posted by Kevin Faulkner (Member # 6) on June 26, 2006, 01:18 AM:
 
Jan, From what Joerg is saying the software is producing that pulse for you. You are getting a square wave at the right frequency depending on what origination the software is playing.

With a second soundcard in the pc you can then tell the software to put that pulse out through the second soundcard where you simply feed it into your GS's ESS input.

Kev.
 
Posted by Flavio Stabile (Member # 357) on June 26, 2006, 03:45 AM:
 
That's great! I understood now and I have created a .wav audio file 1 minute long to play in loop. No problem to create the signal for 25hz. Instead I have problems for 23.976Hz, because ths software I have can only manage two decimal digits and so I have to choose between 23.97 or 23.98! Both of them are anyway wrong!

Flavio
 
Posted by Kevin Faulkner (Member # 6) on June 26, 2006, 04:48 AM:
 
Flavio, I wonder how much film you could sync at 23.97 before you would see the sync drift?

Kev.
 
Posted by Flavio Stabile (Member # 357) on June 26, 2006, 06:43 AM:
 
Well, I really don't know... [Wink]

However I usually sync one reel per time (600 feet) and so I hope I will never get any trouble with sync using a NTSC DVD to re-record my film.

Instead I was thinking to another issue: how to sync the start of the two audio players in the PC, one with audio track and the other with the ESS signal?
I usually start the projector and the audio in sync using the Pedro box...

Flavio
 
Posted by Kevin Faulkner (Member # 6) on June 26, 2006, 07:11 AM:
 
In theory the PC would put out the pulse to the GS when you hit play in the programme. So if you have the GS setup to record on the first frame (waiting for ess signal) and start the PC Prog on the first frame the PC will then start the GS and all should be in sync.

Neat idea me thinks [Smile] Must now get round to trying this out myself.

Kev.
 
Posted by Flavio Stabile (Member # 357) on June 26, 2006, 12:44 PM:
 
Not sure to have fully understood...

When you use the Pedro's box, this has one input (the audio track) and two outputs: the quartz signal for the ESS and the Audio signal for the Audio Input port.
In such a way, like you say, if you stop the projector at the exact frame you wish to start the recording, when you simply press the play on your software application, to reproduce the new audio track to be recorded, the box will start the projector, and the audio signal, coming from the PC and going through the BOX to the projector, will be then in sync with the started film.
So in this case, with one action done(pressing play in the software application) I have two effects: playing audio and starting the projector.

Let's go now to the PC software solution without the hardware box: I have two use two soundcards each of them connected to projector (ESS port and Audio Input port).
Now, if I have well understood, I have to manualy play TWO audio files: the audio signal for the ESS, and the Audio track to be recorded. My concern is how to syncronize the start of these two audio files in the PC with ONE mouse only!

Thanks,
Flavio
 
Posted by Kevin Faulkner (Member # 6) on June 26, 2006, 04:55 PM:
 
I think there is some confusion here.

As you play your disc or file in the Adobe software the software will produce one pulse per frame. This it is getting form the the video pulse sync within the software.

The software has the facility to output this pulse through the sound card but as you want to record stereo sound you will use your existing soundcard for that purpose and then install a second sound card to output the sync pulse which you feed directly into the ESS socket of your GS.

When you start the video it will also start yur GS all with one mouse click. If you play an NTSC disc it will be 23.97 or 25 for Pal.

I hope I have got that right. This is my understanding of the procedure from the posts by Joerg.
 
Posted by Joerg Polzfusz (Member # 602) on June 27, 2006, 02:00 AM:
 
Hi,

just some thoughts/remarks:
On most systems the soundtrack from the DVD will be available on the DVD-player's earphone-plug, too. Hence you won't need a second soundcard.
Most never soundcards do have additional connectors for the center- and rear-speakers. Hence it should be possible to send the DVD's soundtrack to the normal stereo "left-right"-connector and the sync-signal to e.g. the surround-sound "rear speakers"-connector. No second soundcard needed, too.
NTSC-DVDs will either be shown at 23,976 fps or 29,97 fps. The 23,976 fps-speed will be problem.

Jörg
 
Posted by Flavio Stabile (Member # 357) on June 27, 2006, 06:52 AM:
 
Hi Kevin,

my first attempt to pilot the ESS port of the GS1200 with a new created square signal has failed... nothing happens, indipendentely from the level (volume) of the signal!

Furthemore I'm not even sure you can use one Audio file (the new audio track to be recorded) played in one software application to pilot two sound cards (one to produce the audio to be transferred to the projector's audio inputs and the other to pilot the ESS port of the GS1200. The software application has only one card active in one moment.

It could be interesting to hear again Joerg about the two-soundcards solution...

Flavio
 
Posted by Kevin Faulkner (Member # 6) on June 27, 2006, 07:08 AM:
 
quote:
To feed the pulse to the GS, you can directly connect your PC's line out left or right to pin 4 of the ESS DIN input, and line out ground to pin5 (I made an adaptor cable 3,5mm --> DIN).
Flavio
Did you use these pins on the ESS Din socket as suggested by Joerg. A std square wave pulse out from the software should work with the ESS.

Kev.
 
Posted by Paul Adsett (Member # 25) on June 27, 2006, 09:30 AM:
 
Wow, this is getting complicated! [Roll Eyes]
What we need is a detailed step-by-step description that a laymen can undersatand i.e. 'Sync-pulse for dummies'.
 
Posted by Joerg Niggemann (Member # 611) on June 27, 2006, 08:37 PM:
 
Flavio, Kevin's comments are correct. If you want the projector to start together with the sound track by one mouse click, you need to play back both sync pulse and soundtrack from the PC out of one application. That means if your audio application is only capable of controlling one stereo channel of your soundcard(s) at a time, you will be restricted to mono sound: Sync pulse on left, mono soundtrack on right output for example. Using a more complex software like Adobe Audition or Premiere Pro and two soundcards (or one soundcard with surround capability) will allow you to play back one or two stereo soundtracks while providing the sync pulse on a different audio channel simultaneously.

For a first try with NTSC DVD soundtracks, you can go for "Cool Edit 96", which is a predecessor of Audition. Cool Edit 96 is available here

http://freeware.siebernet.de/audio/index.html

and capable of creating the square sync signal at 29.97 or 29.976 Hz. The download is only 2MB. You may also get the 30 day trial version of Audition from adobe.com, which is about 500MB.

If your projector doesn't run up in ESS mode with the soundcard connected and the windows audio mixer set to 100% volume, check for the basic amplitude of your sync pulse waveform: It should be at 0dB (full scale). Hum on the sync connection due to ground problems could also prevent the GS from running up: Try to establish a normal audio connection from the PC to the Audio AUX in of your GS and check for hum when listening to the AUX input over the projector's speakers.

Joerg
 
Posted by Flavio Stabile (Member # 357) on June 28, 2006, 03:35 AM:
 
Hi Joerg,

thank you very much for your great explanation!
For mono soundtrack: one channel with the square signal, the other with the audio track! Why didn't I think before???
I use Sonic Foundry Sound Forge 6.0 as audio editor, and I was able to create the signal at 25Hz. Indeed yesterday I made another attempt connecting the audio output (speaker out, I don't have the line out) of my pc card, but again, it failed!
Probably i need to create the signal with the max amplitude at 0 db.

Just another doubt: could you please confirm the pin numbering of the 6 mini Din ESS port is as follows?

3o o1

5o 6o o4

2o

(when you see the input in the front panel of the projector).

Thanks
Flavio
 
Posted by Dan Lail (Member # 18) on June 28, 2006, 08:36 PM:
 
Where do I get the Audio/Video information? Does my computer have to be able to play a dvd? [Confused]

If someone could draw a diagram for the not-so-technically oriented like myself.

[ June 30, 2006, 12:34 PM: Message edited by: Dan Lail ]
 
Posted by Joerg Polzfusz (Member # 602) on June 29, 2006, 09:40 AM:
 
Hi,

you'll only need the video to see if your film is still in sync. If you don't need this information you could just connect your dvd-player to your soundcard's line-in connector, record the soundtrack on your PC, add the sync-signal and then connect your film-projector to the PC... . In this scenario you wouldn't need a PC that can play back DVDs - 4GB of free space on your harddisk and a soundcard with a line-in and speaker-out would do.

After re-thinking this scenario:
You don't even need to record the soundtrack on your PC or to work with some of the tools mentioned above!
a) Connect the DVD-player's stereo-line-out to the projector's stereo-line-in.
b) Connect the PC-soundcard's line-out to the projector's sync-connector.
c) Create a wav-file with the sync-signal for a single frame (and the required "silence" to match the DVD's speed)
d) Load that wav-file in a wav-player that can repeat that wav-file in an endless loop and pause the playback
e) Start the DVD but pause it at the first frame
f) Load the film in the projector, set the projector to record, ...
g) now "unpause" both the dvd and the wav-player simultaniously
... that should be it!

Jörg
 
Posted by Joerg Niggemann (Member # 611) on June 29, 2006, 06:09 PM:
 
If you use the PC as a sync source only, you can play back the audio signal directly from a DVD player or other source. In this case you have to start the projector and audio separately by hand and establish a synchronous playback. The PC signal will then take care that the projector stays in sync.
All you have to do in this case is

I think all of you who want to give it a try and don't want to do too much with the PC should start with this setup. All other more comfortable variants can be achieved from that point, but first it has to work so far.
Here's how to create the sync pulse signal in "Cool Edit 96" (choose generate-->tones from main menu):
 -

 -

Connect your soundcard audio out to pin 4/5 of the GS1200:

 -

Maybe it all sounds confusing, but it's very easy [Smile]
I tried it with 2 GS1200, different PC's and soundcards and it always worked fine.
Joerg

[ June 30, 2006, 06:26 AM: Message edited by: Joerg Niggemann ]
 
Posted by Flavio Stabile (Member # 357) on June 30, 2006, 04:33 AM:
 
Hi Joerg,

the numbering of pins is different from mine...
this should be the reason why my attempts failed!

I will modify the connection cable and will try again
hoping i will definitely have the GS1200 working!

Thanks
Flavio
 
Posted by Flavio Stabile (Member # 357) on June 30, 2006, 12:24 PM:
 
Cable connection modified... it doesn't work!
I abandon the project...

Bye
Flavio
 
Posted by Kevin Faulkner (Member # 6) on July 01, 2006, 05:14 AM:
 
Flavio, Are you switching the ESS switch to the ESS position and then adjusting the level so that the meter needle sits in the middle.

One thing....are you sure you have a sync pulse coming out from your PC on that lead.

What you could do to check is plug that lead into one of the Elmos line inputs with the vols down low and then turn up the line input level to see if you can hear any sound. It should sound like a fast purring noise.

Kev.
 
Posted by Flavio Stabile (Member # 357) on July 03, 2006, 02:20 AM:
 
quote:
Are you switching the ESS switch to the ESS position and then adjusting the level so that the meter needle sits in the middle?

Absolutely yes... the level doesn't move at all

quote:
One thing....are you sure you have a sync pulse coming out from your PC on that lead.

What you could do to check is plug that lead into one of the Elmos line inputs with the vols down low and then turn up the line input level to see if you can hear any sound. It should sound like a fast purring noise

I tried also this. If I connect to the ELMO audio input I can easily hear the square audio signal...

Useless to say if I use the Pedro's box it works, so there is no defect in the projector... I'm getting crazy, and I don't know where the problem is... I even used exactly the instruction from Joerg to create the square audio signal (CoolEdit 96 etc..)

It doesn't matter...

Flavio
 
Posted by Joerg Polzfusz (Member # 602) on July 03, 2006, 04:18 PM:
 
Hi,

have you connected the correct pins at the soundcard's end of the cable? (E.g. are you using a stereo- or a mono-connector?)

Jörg
 
Posted by Flavio Stabile (Member # 357) on July 04, 2006, 02:35 AM:
 
Hi Jörg,

I have a mono connection to the soundcard but... I created a STEREO square signal in order to avoid to care which connection was active.

Flavio
 
Posted by Jan Bister (Member # 332) on July 04, 2006, 08:43 AM:
 
That's probably it right there. Plugging a mono jack into a stereo plug will create a short-circuit on one channel (I think it was the left one) and that might affect the other one as well. Definitely use a stereo jack... best to connect only one of the two stereo channels (doesn't matter which one) to the ESS input.
 
Posted by Flavio Stabile (Member # 357) on July 04, 2006, 09:49 AM:
 
Jan, this is connector I'm using, plugged in the soundcard

 -

and the mono audio cable is connected to only one RCA of this adaptor, while on the other side of the same cable I have the 6 DIN connector to plug into the ESS port of the ELMO.

Do you think this is still an issue?

Thanks, Flavio
 
Posted by Jan Bister (Member # 332) on July 04, 2006, 10:15 AM:
 
I see. That should work perfectly. [Smile] As long as you're not trying to sync the GS1200 to your audio signal while recording the square pulse on the film's magnetic stripe, that is. (Did you check to make sure?) [Wink]
 
Posted by Joerg Polzfusz (Member # 602) on July 04, 2006, 10:34 AM:
 
Hi,

you can still confuse two pins or have a non-working adapter [Wink]

Jörg
 
Posted by Flavio Stabile (Member # 357) on July 04, 2006, 10:52 AM:
 
Jörg, I checked and checked the connections and they are correct (assuming the PIN numbering provided by Joerg at the DIN input on the ELMO is correct too!)

My guess is that the problem could be in output of the soundcard...
I don't know why, but some cards have a specific LINE-OUT output distinct from the SPEAKER output. This is not my case where I'm using the SPEAKER output: the manual of the card tells this is a SPEAKER/LINE-OUT output i.e a combined output, and I am not sure this is good for the scope.
In general a LINE-OUT output is not affected by rotating the audio volume level, while instead, a SPEAKER output yes!
Is it possible the electrical signals are different?

What do you think?

Flavio
 
Posted by Jan Bister (Member # 332) on July 04, 2006, 12:59 PM:
 
Just about any consumer-level soundcard I've ever, uh, heard of has line-out jacks only, even if they're labeled as speaker jacks (confusing but probably referring to self-powered speakers which still expect a line-level input).
So I have two questions for you:

1. Are you using the same output on your soundcard that you normally use to actually listen to your PC's sound?

2. When following Joerg's wiring diagram (photo showing the ESS jack) did you take into account that the notch on the jack is located to the left rather than the bottom? In other words, looking at the inside of your DIN plug (where the wires are soldered) and with the notch at the bottom, are your wires connected to the two pins to the right? (The pin closest to the notch would be pin 5, the one above it pin 4.)

Now I went over all this in my head several times and I think I got it right... but there could still be user error involved... Check again, and again and again [Wink] Sometimes one can make a mistake and not notice it for a long time until one day, all of a sudden, it stares you in the face and you smack yourself for not seeing it sooner. That happens to me more often than I want to admit. [Wink] Seeing as that everything is otherwise working, I see no other explanation why the syncing is failing - unless you did the software side of things wrong (i.e. square waveform not playing in an infinite loop, or not playing along with the audio signal, or what-have-you)...
 
Posted by Flavio Stabile (Member # 357) on July 04, 2006, 05:46 PM:
 
Ian and everyone who was so kind to support me in this... I finally had the projector working!

Infact the only last thing I could do was to use another soundcard and now it works!!! I would like understand now why...

Going back to Ian's questions

quote:
1. Are you using the same output on your soundcard that you normally use to actually listen to your PC's sound?
Yes, I used the same output.

quote:
2. When following Joerg's wiring diagram (photo showing the ESS jack) did you take into account that the notch on the jack is located to the left rather than the bottom? [...]
Absolutely yes!

Again thanks to everyone!!!

Flavio
 
Posted by Jan Bister (Member # 332) on July 04, 2006, 07:43 PM:
 
Now THAT's what I call a mystery! [Eek!] Another soundcard was the solution, huh? I too would like to know what the cause of the problem was... but anyway, glad you got it working now! [Smile] [Smile]
 
Posted by Joerg Niggemann (Member # 611) on July 05, 2006, 04:38 PM:
 
Flavio, great to hear that it works for you now. The only reason I can imagine is the output level of your soundcard(s). A "proper" input signal for the ESS circuit should have a 5V TTL level, which isn't a typical line out level for sound devices. So in any case, we provide a "non standard" signal to the ESS input. This seems to work in many cases, but apparently we can also run into problems...

Please let us know about the 23,97Hz performance. I was only able to prove that the GS runs at 23,97Hz using a frequency counter, but didn't make a real test with a DVD.

Joerg
 
Posted by Kevin Faulkner (Member # 6) on July 05, 2006, 05:29 PM:
 
Flavio, Great news. Let us know how you get on. Kev.
 
Posted by Mike Peckham (Member # 16) on July 06, 2006, 02:43 AM:
 
An article on this inovative idea would make great reading in "Small Format" and/or "Film For The Collector" magazine... [Wink]

Mike [Cool]
 
Posted by Flavio Stabile (Member # 357) on July 10, 2006, 11:08 AM:
 
Hi All,
sorry for the delay...

I'm not sure to have fully understood what kind of proof should I do with 23.976..

Joerg confirmed to have measured the speed of the ELMO controlled by the Square Audio signal configured to produce this kind of frequency, so please, what you would expect I should have to try?

Furthermore I don't have any Ntsc DVD version of a related Super 8 movie, so how can I answer your doubts?

thanks
Flavio
 
Posted by Kevin Faulkner (Member # 6) on July 10, 2006, 12:57 PM:
 
Ah, yes that is a problem as you would need to run an NTSC DVD (region 1) in sync with a super 8 feature to see if it will hold in sync for say the first 20 mins.

Kev.
 
Posted by Dan Lail (Member # 18) on February 21, 2010, 03:27 PM:
 
I am bringing this topic back up because I think many forum members are probably more adapt to using computer technology now than they were four years ago. Especially me. [Big Grin] I am going to attempt this as soon as I make the cable that connects the PC line to the ESS in.

Thanks, Joerg. [Smile]
 
Posted by Alexander Vandeputte (Member # 1803) on March 07, 2010, 10:40 AM:
 
Have just checked this out on my version 1 GS1200 using CoolEdit and indeed it does work !
Is it correct that when set to ESS and 24fps, the projector can only be steered within the -2 / +2 frames range? Meaning: When I provided the machine with a 18hz signal, it did not seem to run at 18fps.
 
Posted by Bill Brandenstein (Member # 892) on March 30, 2010, 04:58 PM:
 
Alexander, a little slow on the draw here. When set to ESS, the speed control shouldn't need to be moved from center when the Elmo is set to 18 fps with an 18 pulse or 24 fps for a 23.976 pulse. I have done 15fps transfers and found that the speed and level knobs need to be adjusted to not put stress on the ESS circuit (evidenced by a jumping needle).

Guys, bear in mind that the odd NTSC framerates are derived by dividing the source frame rate by 1.001, which for 24 results in 23.976023976... This makes it easier to calculate any framerate to coincide with NTSC video. Better yet, at 48Khz for an audio sampling rate, 23.976 is absolutely locked down if your pulses fall exactly 2,002 samples apart. Then, if you've ripped the sound into your computer from the audio source, so there are no analog steps involved, sync should be a cinch.
 
Posted by Dan Lail (Member # 18) on February 28, 2011, 06:51 PM:
 
Joerg, did you generate the square signal with Adobe Audition?

I have CyberLink DVD Suite, but I can't find where to generate a tone. I have a program called Audacity win which I can generate a square signal. How would I get a square signal through my DVD Suite editor?
 
Posted by Dan Lail (Member # 18) on March 20, 2011, 07:34 PM:
 
Update!

I have downloaded Adobe Premier 4 video editing software. I captured a few minutes of video. Using a free recording software called Audacity I was able to generate a 25hz square signal. I save the square signal in an mp3 file. When I reopen Adobe Premiere 4 I import the 25hz square signal from the mp3 file into the video project where I can play the video and the square signal simultaneously. In the Adobe mixer I can run the square signal out the left side out and the mono video audio out the right side separating them. when I make the ESS sync cable I will report back with the recording results. If this mono project works I'll try a stereo configuration.

When constructing the sync cable I will have a 6 pin din on one end and an RCA mono on the other end. Referring to Joerge's wiring diagram above I am going to connect the wires from pin 4 and 5 to the two RCA poles. Number 4 going to the plus(tip) and 5 to the other. Hop e this is correct. If I am successful I will be able to rule the world!!!!!!! Aaaaaaaaaaaaaahahahahahahahahaaaaaaaa.................cough!cough!
 
Posted by Bill Brandenstein (Member # 892) on October 14, 2011, 12:51 PM:
 
Hi Dan, wondering if you ever got your cable to work and any successful sync? Although you mention a 25 Hz square wave, which if you're using an NTSC disc from here in the USA, your projector will run too fast, making the sound fall behind.
 
Posted by Winbert Hutahaean (Member # 58) on January 29, 2015, 07:10 PM:
 
This is a 9 years old post, but NOW it becomes so important for us because Pedro box is no longer available.

Moreover, software for audio/video are available better than 9 years ago but the trick introduced by Joerg is still valid.

So could the moderator stick this topic on top so we never loose this once we need it.

cheers,
 
Posted by Steve Klare (Member # 12) on January 29, 2015, 08:09 PM:
 
I think we should take posts that reflect common problems and copy 'em into a FAQ directory.

The Classics:

-Why can't I get sound out of my Elmo (switches, jacks)
-How do I clean the soundhead on my Eumig (the Adsett Procedure)
-Why does my ST-1200 start so slow? (Lubrication, shutter rim...)
-Eumig Hum (Hum Buck Coils...)
-Can I wedge a 1000W lamp into a GAF silent projector (....no.)
 
Posted by Winbert Hutahaean (Member # 58) on January 29, 2015, 08:19 PM:
 
One more thing Steve:

- Which lubrication is the best (FilmGuard vs Vita vs ...)

or another one may be:

- Is "Rose" a good digest? (...eerrrrrr..yes...)

cheers,
 
Posted by Steve Klare (Member # 12) on January 29, 2015, 09:24 PM:
 
Tape or Cement???!!!!
 
Posted by Tom Dee (Member # 4468) on January 30, 2015, 09:22 PM:
 
This may sound like a dumb question, but if you have a 400ft reel that lets say has a lot of action in it..but its not the complete scene will the GS1200 automatically stop and start when it detects the pulse for the scene..for example say you play a boxing movie..the original fight scene lasts for 4 mins on the dvd un-edited, but your scene that you have on film lasts for only 3 minutes..because it has be edited for time. How does the GS cope with that.
 
Posted by Bill Brandenstein (Member # 892) on January 30, 2015, 09:36 PM:
 
Winbert, I'm out of the loop about Pedro, what happened to him?

Tom, I've rarely taken this sort of thing on because the method you're describing - with the pulse and projector discontinuous - produces a quickly rising/falling pitch change at the stopping points and would be pretty much distracting, if not worth a good laugh, to your audience. And so the only way around that is to edit your sound source to exactly coincide with the picture. I've found that to be a LOT of work! Whether it's worth it, and the hassles of learning software and getting media gathered in, is up to you.
 
Posted by Dino Everette (Member # 1378) on January 31, 2015, 12:48 AM:
 
bill, pedro was having some health problems and seems to have stepped away from super 8, shut down his web site to work on his health.

The thing I have never understood about this was what kind of cable do you use to go from the computer output into just 2 pins on the ESS input? It seems to need to be some homemade cable, yet no one ever posted a picture.
 
Posted by Paul Browning (Member # 2715) on January 31, 2015, 09:12 AM:
 
Hi Dino, there is a picture of the pin out on the ess socket of the gs 1200 elmo, as you look at the socket from the rear of the machine, there are 6 pins including a centre pin, its the two bottom pins that are used, the pin just below the centre pin and to its left is pin 5 earth, and the pin immediately to the right of this is pin 4 pulse in. You can get the din plugs for these still, you just have to decide what goes on the other end, mine is a 3.5mm mini jack plug, or you could use a phono plug. I used audacity to produce the square wave pulse to lock the elmo to centre position for syncing up to the sound.
 
Posted by Dino Everette (Member # 1378) on January 31, 2015, 11:35 PM:
 
Paul
yes I understand where the plug in goes, but could someone please show a picture of what this finished cable you are using actually looks like .. Are you soldering together some new cable together from a typical 3.5mm mini plug? If so what wire gets soldered to which wire? and what does the final version look like? Does the side that plugs into the GS still have 6 pins with only 2 of them being connected? or is it some unique creation that only has 2 pins?--I understand the concept but I cannot for some reason visualize what this cable looks like... [Confused]
 
Posted by Alan Rik (Member # 73) on February 01, 2015, 01:05 AM:
 
Hey Dino,
So when I did it I had to get 2 parts.
This one from Mouser Electronics:

http://www.mouser.com/ProductDetail/Kobiconn/172-2006/?qs=%2fha2 pyFaduiW9G5FizzDAYIp5WWoIIb2K%252b7lvfsFjmk%3d

And then this other part:

http://www.mouser.com/ProductDetail/Kobiconn/17PP048-EX/?qs=%2fh a2pyFadujKdR3VHLThwHsuDURQAXRo5M1f%2f6xSRXo%3d

Then you have to connect the 2 wires to the proper pins on the DIN plug. I had an Electronic Engineer do that for me and then you can use the audio out on your computer, mine uses a mini jack, and then plug in the other end, the DIN plug to your GS1200 and then the software that I use, Logic, will emit a signal of 29.97FPS and the GS1200 will lock into that Frame rate and will not drift! Simple! Well..sort of. [Smile]
Good luck!
 -
The GS1200 only uses 2 pins off of that DIN plug so you just need to find out which pins get soldered to the 2 wires coming off the end of the mini jack.
 
Posted by Dino Everette (Member # 1378) on February 01, 2015, 01:42 AM:
 
Alan, thank you! I feel sometimes like a few pics can solve any confusion on the forum, since for whatever reason sometimes things just don't translate until you can see it [Eek!]
 
Posted by Paul Browning (Member # 2715) on February 01, 2015, 09:02 AM:
 
Yes Dino, a picture paints a thousand words. This cable is similar to mine, except I fitted a stereo 3.5 mm cable and sent the mono sound to the main channel for recording on the elmo, so the din plug to the ess and a mono 3.5mm to the main channel in and using virtual dj software this can play both sound on one deck, and the pulse on the other. I used twin screen and earth to make up the cable.
 
Posted by Alan Rik (Member # 73) on February 01, 2015, 05:49 PM:
 
I know what you mean about needing a picture. When I worked for Crest Film Labs in Hollywood many moons back one of the lab managers tried to explain A Wind and B Wind. I just couldn't get it so he had to take a piece of paper and draw it out for me. I finally got..I think I forgot it now though! [Smile]
 
Posted by Bill Brandenstein (Member # 892) on February 08, 2015, 03:42 PM:
 
Well done, Paul, your information is pure gold! I'd caution everyone concerning one little detail, however, and that is that the mini plug pictured is one of the 2-conductor mono variety. No computer audio jack is mono. So that means using such a plug is shorting together the L/R outputs (if aligned correctly) and that may not be the best thing to do to your electronics.

Simple solution is to get a 3-conductor (T/R/S) plug and only use one of the channel outputs plus the ground, discarding the other signal.
 
Posted by Andrew Woodcock (Member # 3260) on February 08, 2015, 04:11 PM:
 
yep, really pleased you are happy with your results Bill, but you are absolutely correct Sir, always use a Stereo 3·5mm mini jack when connecting to your computer's audio output. ( the type with two black bands )
 


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