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Old 12-19-2017, 09:52 PM   #12
AcousticAl
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Join Date: Nov 2012
Location: South of the Mason-Dixon
Posts: 645
Quote:
Originally Posted by Lox-StoryConnective View Post
Good to know; this is very helpful. Thanks.
So, RF interference affects (long) unbalanced cables & not long balanced cables. Otherwise, all other factors being equal, there is no difference in sound quality between balanced & unbalanced cables?
At short distances, no. Over longer runs, unbalanced can add noise and lose overall sound quality.

Quote:
Originally Posted by Lox-StoryConnective View Post
Is this because during a walk-and-talk interview the wireless receiver operator can effectively monitor the sound (gain, mic placement, etc.) while both interviewer & interviewee have freedom of movement (within transmission range of course), making wireless the ideal choice in this scenario?
That, and wired lavs on a walk-and-talk are a massive trip hazard. And it’s damn near impossible to keep the cables out of the shot.

Quote:
Originally Posted by Lox-StoryConnective View Post
I get what you're saying about some mixers/recorders/cameras having XLR input jacks & some wireless transmitters having input 1/8” (3.5mm) jacks, and that there are different lav connectors for each. And what the sound person is going to use depends on the scenario.
Ummm... yeah. That’s a bit of a convoluted summary, but you’re in the right neighborhood.

Quote:
Originally Posted by Lox-StoryConnective View Post
Let's see if I've got it. Reasons for the axiom: “Whenever able, use a cable”
1. Wired means not worrying about dropping a wireless connection signal - as opposed to wireless in a big city environment for example,
Correct. That, and any artifacts that may be introduced by the wireless system (the better the system the less those artifacts will be).

Quote:
Originally Posted by Lox-StoryConnective View Post
2. Sound person can better monitor the situation (eg. battery life of recorder v. battery life of wireless transmitter).
I am not at all a fan of the idea of putting a recorder on the talent and walking away to leave it running on its own. So, yeah. Having the recorder/mixer in the bag or close to the camera allows for better monitoring of everything.

Batteries for wireless transmitters are rarely a concern if you follow proper protocol on a shoot day: fresh batteries at breakfast, fresh batteries at lunch. And if the day goes long, fresh batteries at dinner.

Quote:
Originally Posted by Lox-StoryConnective View Post
I have certainly grokked -both from this thread & from personal field experience- that sound quality depends largely on choosing the right tool in the right scenario & that that is most important above all for getting the best sound.
Absolutely, but just as important is proper use of that tool. A cheap mic will outperform an expensive mic if the cheap mic is placed in the right spot and the expensive one isn’t.

Quote:
Originally Posted by Lox-StoryConnective View Post
Let's try another hypothetical:
A film is being made that will include both locked-down interviews & walk-and-talk interviews. For the locked down interviews, sound person is using pro audio brand lavs plugged via an XLR connector into a balanced input into a pro audio brand mixer. For the walk-and-talk interviews, it's the countryside & there is no RF interference, the sound person is using a pro audio brand wireless system with the same brand & model lav as used with the aforementioned mixer, only this lav has a 1/8” (3.5mm) connector because it is being plugged into a pro audio brand wireless transmitter that accepts 1/8” (3.5mm). As both these environments & input devices are distinct, this sound person understands that the audio from each of these recordings will sound different.
Only slightly different, and only because of location/ambient surroundings and the fact that the wireless system’s compander may affect the dynamic range of the signal. But if, for example, we’re talking about a Sanken COS11 terminated for XLR/phantom use vs. a Sanken COS11 terminated for wireless use, the sound will not be that drastically different and in the edit should be nearly indiscernible aside from the audible environment.

Quote:
Originally Posted by Lox-StoryConnective View Post
However, the sound person would like to know if the sound quality from the unbalanced wire is diminished in comparison to the sound quality from the balanced wire.
If the sound person is truly a sound person, he or she will know the answer to this. If the sound person is a newbie and is generally curious: continuing the example using the Sanken COS11, the 3.5mm-terminated lav runs only 18” or so into the transmitter and will not suffer any reduction in quality as compared to the XLR-terminated Sanken COS11 running straight to the mixer.

Last edited by AcousticAl; 12-19-2017 at 09:57 PM.
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