FAQ FAQ  Forum Search   Events   Register Register  Login Login

2 mic audio issue
Author
  Topic Search Topic Search  Topic Options Topic Options
Caprice View Drop Down
Groupie
Groupie

Joined: 22 February 2016
Country: Australia
Status: Offline
Posts: 100 		Post Options Post Options   Quote Caprice Quote  Post ReplyReply Direct Link To This Post Topic: 2 mic audio issue
    Posted: 14 August 2024 at 08:41
Hi,
I have a 2 mic audio setup on my A7sIII.
I have noticed while one mic comes in fine, the second mic records quiet.
I have swapped the mics over and come to the conclusion it is the cable running from the mics to the camera.
This cable has one red lead and one black lead running from the mics before combining together to plug into the camera.
Can someone shed some light as to why one cable records at a quieter volume than the other?
The reading on the camera shows both mics recording fine but aren't once I listen to the output.
Appreciate any assistance.
 



Back to Top
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 15487 		Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2024 at 18:25
What is the quality of the cables?
One cable might have more electrical resistance resulting in a lower voltage on the camera side.
Why not follow me on Instagram? @Addy_101
Back to Top
Caprice View Drop Down
Groupie
Groupie

Joined: 22 February 2016
Country: Australia
Status: Offline
Posts: 100 		Post Options Post Options   Quote Caprice Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2024 at 08:17
The splitter cable is new so shouldn't have any damage. Even the audio I was hearing via an ear plug is not a genuine representation of audio being recorded.
Back to Top
4paul View Drop Down
Senior Member
Senior Member

Joined: 26 July 2011
Country: United States
Location: St Petersburg
Status: Offline
Posts: 1960 		Post Options Post Options   Quote 4paul Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2024 at 13:55
If the audio level sounds different when playing back, are the audio levels indicated in software different, or at the same level? And are the microphones the same make/model?

If the levels are different, there is a problem with the cable (is it one of the Rode Y-shaped cables?), or the microphones have different impedence, so the sound levels will be different - if the microphones record good audio when plugged directly into the camera, the AGC AutoGainControl is probably compensating for the different impedence, but with two different microphones connected it will not compensate.

Issues like these are why people use external recorders, and plug the microphones into different devices, instead of using the Y splitter cable.

Although you said the levels in the earpiece sound good ... if it you only hear the difference on playback, it would be Phase Cancellation with both microphones at the same time on the same audio pair track; muting one microphone, so you only hear one microphone should sound good.
There is a difference between a shaky or out-of-focus photograph and a snapshot of clouds and fog banks. - Schrödinger
Back to Top
Caprice View Drop Down
Groupie
Groupie

Joined: 22 February 2016
Country: Australia
Status: Offline
Posts: 100 		Post Options Post Options   Quote Caprice Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2024 at 06:31
Thanks Paul.
I just did a test (yes, it's a Rode Y splitter) using a Rode mic.
Plugged into the black end, the mic is strong but plugged into the red, the mic is working but weak.
I was using two different mics via the splitter and was wondering about any compensation or over powering issues.
I have the option of buying a Rode wireless Pro system which is two mics into one receiver but it's not cheap.
I'm hoping to avoid needing to record a separate audio file as I believe the file can't be edited in editing software such as Premiere Pro and requires another Adobe suite?
Back to Top
4paul View Drop Down
Senior Member
Senior Member

Joined: 26 July 2011
Country: United States
Location: St Petersburg
Status: Offline
Posts: 1960 		Post Options Post Options   Quote 4paul Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2024 at 21:35
Originally posted by Caprice Caprice wrote:

I have the option of buying a Rode wireless Pro system which is two mics into one receiver but it's not cheap.
I'm hoping to avoid needing to record a separate audio file as I believe the file can't be edited in editing software such as Premiere Pro and requires another Adobe suite?


A 2 mic wireless setup is a good idea to avoid those problems, but very expensive yes, unfortunately.

Premiere has most audio functions, Adobe Audition has the fancy "audio sweetening" tools but isn't really needed.

For using an external recorder, I don't know what the latest versions of Premiere do, but the general procedure is the same, import, sync, then merge - here is an old short tutorial https://fstoppers.com/audio/how-sync-audio-and-video-premiere-pro-198167

The Blackmagic/DaVinci Resolve editing software has all the tools, is very in-depth and has a learning curve.
There is a difference between a shaky or out-of-focus photograph and a snapshot of clouds and fog banks. - Schrödinger
 



Back to Top
Caprice View Drop Down
Groupie
Groupie

Joined: 22 February 2016
Country: Australia
Status: Offline
Posts: 100 		Post Options Post Options   Quote Caprice Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2024 at 23:44
Thanks Paul.
I'll check out what PP can do and go from there.
Thanks for your insights.
Cheers!
Back to Top
Wētāpunga View Drop Down
Senior Member
Senior Member

Joined: 02 September 2007
Country: New Zealand
Location: New Zealand
Status: Offline
Posts: 6785 		Post Options Post Options   Quote Wētāpunga Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2024 at 00:39
Originally posted by Caprice Caprice wrote:

Thanks Paul.
I'll check out what PP can do and go from there.
Thanks for your insights.
Cheers!


Final Cut Pro also lets you easily synch audio from an external recorder to your video project, so I imagine Premiere Pro has similar feature. It would be strange that out of the three (DaVinci, PP, FCPX), Premiere would miss this important function
α1- Voigtländer 15/4.5, 110/2.5 M; Zeiss Loxia- 21/2.8, 35/2, 50/2 & 85/2.4, Zeiss Batis- 85/1.8 & 135/2.8; Sony 24-105/4 & 100-400/4.5-5.6; Sigma 70/2.8 M; Sony 135/2.8 STF
Back to Top
Caprice View Drop Down
Groupie
Groupie

Joined: 22 February 2016
Country: Australia
Status: Offline
Posts: 100 		Post Options Post Options   Quote Caprice Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2024 at 23:42
Thanks Wetapunga, I'll see what PP can do.
Cheers!
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Video Talk

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.080 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.