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Topic: Re-recordings with a PC
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Jan Bister
Darth 8mm
Posts: 2629
From: Ohio, USA
Registered: Jan 2005
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posted 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 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. 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)...
-------------------- Call me Phoenix. *dusts off the ashes*
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Bill Brandenstein
Phenomenal Film Handler
Posts: 1632
From: California
Registered: Aug 2007
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posted 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.
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