Conventions for Input 1 and Input 2

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David L Lewis
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Joined: Jan 11 2006

I've just bought my first "prosumer" camera with two XLR inputs instead of the usual 3.5mm jack found on consumer cams.

Ive also got a radio mic and an external onboard mic. The radio mic will be for oicking up the voice of the person speaking and the external mic for picking u ambient sound.

Is there any convention about which mic should go to which input or doesnt it matter.

Best to try and get it right from the start

David L Lewis

Hello I'm in Mensa, Is there anything you would like me to explain to you?

Dave R Smith
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Joined: May 10 2005

Come Come David - you should know better.
I'm sure both channels are same, but if you're after idiosyncracies you need to tell us make and model of your camera.

Also relevant to the question is with mikes are mono or stereo.
Radio mike will be mono but external mike may well be stereo.
Again make/model will help constructive answer.;)

Dave.

RayL
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Joined: Mar 31 1999

I think it's a perfectly reasonable question.

Here's an answer - and a couple of reasons.

Left - Radio mic. Right - ambiant sound

Reason 1. Your speech signal is more important than your ambiant sound. So if, later in the editing chain, your stereo signal suffers a reductio to mono (if a stereo jack plug is put into a mono socket, for example) the it is the Left signal on the tip of the plug that will be retained.

Reason 2. Radio mics have long had a mono jack on their connection lead. If that plug is put into a stereo socket the signal will go only to the Left channel. As all radio mics will do the same, you are consistant with standard practice.

Ray Liffen

fotografics
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Joined: Dec 13 2005

The convention is: Audio 1. Main sound, mixed audio, interviewee
Audio 2: atmo, ambient, on camera mic.

The reason is that betacam had/has track 2 on the edge of the tape, track 1 comes next and then the video, so if there was any damage, buckling or damaged coating at the edges of the tape (where it's cut) then track 1 is less likely to be damaged than track 2.

David L Lewis
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I didnt think the make of the camera would have mattered but the Camera is an HVR-Z1E

Yep I'm lucky to have a wife who lets me indulge my hobby

The two mics Im using are a sony uwp-C1 Radio mic and a Sony ECM 648.

The ECM 648 is now being shipped as part of a bundle with the HVR-z1e, I'm assuming both are Mono

I'm just getting my head round inputs and channels and now you guys have thrown left and right into the mix.

am i right in assuming Left is Channel 1/input 1 and right is channel 2 /input 2

David L Lewis

Hello I'm in Mensa, Is there anything you would like me to explain to you?

Dave R Smith
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Hi David,
My response was partly in tease.
I suspected you had a nice shiny new Z1E, but HD wasn't mentioned, so I had my doubts.

I thought there may have been a mixing issue - if you had one mono source (radio mike) and one stereo source (external mike). Sounds like this isn't the case though.

I would be interested to know if your tests show that on connection of one (or both) of the xlr's the internal built-in is automatically disabled or whether you can have
-left internal built-in
-right radio mike

I'm guessing it's not automatic, but done via menu for 'External audio' ON/OFF

>am i right in assuming Left is Channel 1/input 1 and right is channel 2 /input 2
This is true for cameras I've used. In testing, use earphones and flick finger across surface of each mike - so you can tell which mikes are enabled and on what channel.

Dave.

Alan Roberts
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I broadcast/pro, the convention is that channel 1 (left) is used first, for whatever's most important. That's why you'll find switching to route Input 1 to record channels 1 and 2 when you haven't got anything plugged in to Input 2. This convention survives all the way through the broadcast chain to the tv set, where the left channel is the one taken as mono when stereo's not being handled (the white phono).

Clearly, if you're not recording stereo, t doesn't matter how myou do it so long as you deal with it properly, but you might as well stick with convention.

Get my test cards document, and cards for 625, 525, 720 and 1080. Thanks to Gavin Gration for hosting them.
Camera settings documents are held by Daniel Browning and at the EBU
My book, 'Circles of Confusion' is available here.
Also EBU Tech.3335 tells how to test cameras, and R.118 tells how to use the results.

mooblie
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David L Lewis wrote:
....The ECM 648 is now being shipped as part of a bundle with the HVR-z1e....

Can you confirm that please, David? It looks like a Sony-factory included option, and not your dealer's freebie? i.e. it would be now in all new Z1s?

Martin - DVdoctor in moderation. Everyone is entitled to my opinion.

Dave R Smith
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Joined: May 10 2005

Talking to (not too wised up) man on Sony stand at videoforum, the mike is not included and was not in evidence at other stands that retailed it.
He did mention one of Sonys smaller HD cameras that did come with external mike package.
A few sellers where offering packages with extras though.
Couldn't say what was at instigation of Sony and what was retailers own initiative.

Dave.

David L Lewis
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Joined: Jan 11 2006

I got my info from one of the Sony Reps at Video Forum and also from the Sony Website
http://www.sonybiz.net/hdcam

seems its a promotional offer untill 31st March

David L Lewis

Hello I'm in Mensa, Is there anything you would like me to explain to you?

mooblie
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Thanks for the heads-up, D.L.L!

Martin - DVdoctor in moderation. Everyone is entitled to my opinion.

Alan Roberts
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The A1 comes with a mic, ECM-NV1, cardiod (might be hypercardiod) but fairly insensitive. Claire Watson's already replaced hers with a Rode NTG1 shotgun to great effect.

Get my test cards document, and cards for 625, 525, 720 and 1080. Thanks to Gavin Gration for hosting them.
Camera settings documents are held by Daniel Browning and at the EBU
My book, 'Circles of Confusion' is available here.
Also EBU Tech.3335 tells how to test cameras, and R.118 tells how to use the results.

David L Lewis
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Joined: Jan 11 2006

I'm using the ECM 648 Alan, its supposed to be an alternativre to the 678. Its about £300 cheaper but seems at the moment ok for the job.

David L Lewis

Hello I'm in Mensa, Is there anything you would like me to explain to you?

Dave R Smith
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I was just reading the specs on the z1E and I noticed it says INPUT1 can go to just CH1 or both. See page 5.
http://www.cke.co.uk/HDV.pdf
Thought it may be of interest.