Activity › Forums › Apple Final Cut Pro › Interview Audio Not Playing on iPhone speaker?
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Interview Audio Not Playing on iPhone speaker?
Bill Davis replied 11 years, 10 months ago 4 Members · 21 Replies
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Jeremy Garchow
July 7, 2014 at 8:20 pmI would go through and turn off “mono2” for every clip and try to reexport.
Jeremy
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Brett Sherman
July 8, 2014 at 2:13 amDefinitely a phase issue. I’ve had this happen to me when my headphones weren’t making good contact. You can hear the music, because there are differences between the Left and Right speakers, but when dialogue is down the center they cancel each other out. The iPhone speaker undoubtedly combines the L & R channels so you’ll get phase cancellation. I swear I can hear that it is out of phase just by listening to your sample on stereo speakers.
Now how your audio is getting out of phase is the question. This can happen with a damaged XLR cable. In your case, I think plugging a single 3 conductor lavaliere into a stereo mic jack can make the channels out of phase with each other. The solution is as Jeremy says, make the channels mono, disable one of them.
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Bill Davis
July 8, 2014 at 9:38 amYep, I think this the exception that proves the rule.
Usually a signal doesn’t get so perfectly out of phase that it comes close to summing to zero, but it can happen.
My studio is still down waiting for an air conditioning repair, so I’m editing in the main house on my laptop. Glad someone with good audio access could hear it.
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Erick Puentes
July 8, 2014 at 4:37 pm@Jeremy: Yup, that did the trick. Below is a link to the updated video that now works on iPhone via speakers.
https://www.youtube.com/watch?v=euPEemGcdZw
Just curious, If I were to have changed the audio in the original footage before I created the multi-cam, would it have translated to the actual project or would I have to make that change everytime within the project?
@Brett: I have to figure out how to get the audio to record stereo. I am going directly in the DSLR but I might need to looking into a recorder like the Zoom H4N.
Thanks for ALL your help guys!
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Jeremy Garchow
July 8, 2014 at 4:49 pm[Erick Puentes] “Just curious, If I were to have changed the audio in the original footage before I created the multi-cam, would it have translated to the actual project or would I have to make that change everytime within the project? “
After syncing, you would choose the channel configuration on the multiclip, and then start the editing process.
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Brett Sherman
July 9, 2014 at 11:57 amhttps://www.bhphotovideo.com/c/product/252280-REG/Hosa_Technology_YMM_261_Stereo_Mini_Male_to.html
This is what you need. It seperates your stereo input into 2 mono inputs. If your lav needs plug in power I’m not sure if it will still work or not. But worth a shot.
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Erick Puentes
July 9, 2014 at 1:21 pm@Brett: We are using a Audio-Technica AT899 Lavalier. Although it is an XLR, we are using an XLR to Stereo 3.5 adapter. I know we really should be going directly XLR to a recorder like the Zoom H4N but we need to justify it in terms of amount of videos produced. I’m sure that will come in time. Thank you for the suggestion.
@Jeremy: Thank you for the advice! I will be sure I make those changes in the next production.
You guys ROCK!
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Brett Sherman
July 9, 2014 at 4:49 pm[Erick Puentes] “Although it is an XLR, we are using an XLR to Stereo 3.5 adapter. “
There’s your problem right there. XLRs have a positive phase (pin1) and a negative phase (pin3) and a ground(pin2). You’re sending the positive phase to the left channel and a negative phase to the right channel. What you want is to have both tip and sleeve come from pin 1. Or just cut off the wire to pin 3 to get just a single channel
See this diagram
https://www.scotaudio.com/wiring.htm -
Erick Puentes
July 9, 2014 at 7:42 pmMakes sense but at the end of the day, I just just shut off one of the mono tracks in my clip. If I were ingesting tons of clips then that might be a better way to go but at that point I would just do it right and get myself a Zoom recorder or the like.
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