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David Sikes
1/8" cable noise
on May 20, 2020 at 6:29:20 pm

We are implementing a Blackmagic ATEM Mini Pro switcher into some of our work right now. Everything has been meeting our needs with one significant weak link: the 1/8" audio input. I'm usually getting a line level from the house audio over XLR that I run into an audio recorder to handle the conversion to get it into the ATEM. Every step of it sounds great, including in the audio recorder - except for that final connection to the ATEM. When I plug into that, I hear a lot of interference on the ATEM side. Is there any way to prevent this or fix this when dealing with 1/8" cable? Are different cables better and shielding the signal than others? Thanks for any advice you can give!


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Ty Ford
Re: 1/8" cable noise
on May 21, 2020 at 1:09:30 am

Hello David and thanks for stopping by the Cow Audio Forum.

Yes different cables can make a difference.

Is this an unbalanced or balanced input?

Is this a mono or stereo feed?

Thanks,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


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David Sikes
Re: 1/8" cable noise
on May 21, 2020 at 6:20:55 pm

Thank you for the response! The ATEM Mini Pro input is an unbalanced input. I believe it's a stereo feed, but I could be mistaken.


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Ty Ford
Re: 1/8" cable noise
on May 21, 2020 at 6:59:41 pm
Last Edited By Ty Ford on May 21, 2020 at 7:07:21 pm

Hello David,

I called BMD phone support here in the USA. (408) 954,0500, btw.

The two jacks of the ATM Mini Pro are labeled "mic", which leaves a lot to the imagination.

1/8" connectors may be wired for mono or stereo, balanced or unbalanced.

According to Tony, they are unbalanced stereo line level, inputs. Probably -10, consumer line level.

AHA! Tony says the jacks can be set by software. You can set the inputs independently for -55 mic or -15 consumer line.

So I think you just have a plumbing problem.

Tony says try the following link for support at BMD: Look for Tony or Gary

https://forum.blackmagicdesign.com/viewforum.php?f=4&sid=463c18c0df32fb3dae...

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


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David Sikes
Re: 1/8" cable noise
on May 22, 2020 at 1:13:54 pm

Thank you so much for that information! When you say "plumbing problem" - do you mean the cables themselves? What should I look for when getting cables?

Thanks again.


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Ty Ford
Re: 1/8" cable noise
on May 22, 2020 at 1:22:20 pm

Hi David,

Plumbing Problem: That's when the wiring of the plugs and jacks is incompatible, e. g. A mono balanced plug going into a stereo unbalanced jack, or an unbalanced stereo TRS going into a jack that only wants to see a mono balanced TRS.

Tony said the jacks were stereo unbalanced. I have no clue how you're supposed to feed a mono source into that except perhaps with a plug wired as a TS that'll feed BOTH of your stereo input channels.

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


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David Sikes
Re: 1/8" cable noise
on May 22, 2020 at 3:43:24 pm

Got it. This gets me a lot closer to figuring out a solution. Thanks so much!


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