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BM Bi-Directional Micro Converter audio issues

PostPosted: Tue May 29, 2018 11:54 am
by robwood65
I have tried using the BiDirectional HDMI/SDI Micro Converter to convert an HDMI signal from my A7Sii to SDI.
Unfortunately the audio is distorted on the SDI output from the converter when the camera sends 1080i (interlaced) 50 to it.

Has anyone else had an issue with this box when feeding in HDMI 1080 50i?

I've tried using the 7.3 converter software but there's nothing to change/adjust with the audio settings.
To be clear the box works fine if I send 1080P 50 from the camera but the audio distorts if I send 1080i (interlaced) 50.
I need it to decode interlaced HDMI to SDI for use with a RadioCam system.

Many thanks for any advice.

Rob

Re: BM Bi-Directional Micro Converter audio issues

PostPosted: Tue Oct 30, 2018 9:30 pm
by mjehnichen
Hi Rob,
yes i am facing the same issue - but only on the right channel. It only happens in 1080i50 and with the bidirectional Microconverter hdmi to sdi on my Atem Television HD .When i use other converters (BMD hdmi to sdi) everything works fine. I have red another thread in this forum about it but obviously BMD does not change this behaviour. Did you find a solution other than buying another converter?

Re: BM Bi-Directional Micro Converter audio issues

PostPosted: Fri Dec 21, 2018 5:55 am
by Koko Pudja
mjehnichen wrote:Hi Rob,
yes i am facing the same issue - but only on the right channel. It only happens in 1080i50 and with the bidirectional Microconverter hdmi to sdi on my Atem Television HD .When i use other converters (BMD hdmi to sdi) everything works fine. I have red another thread in this forum about it but obviously BMD does not change this behaviour. Did you find a solution other than buying another converter?


Exact same setup and same problem with me. Converting 1080i50 HDMI to SDI as an input to ATEM Television Studio HD and the audio is very much distorted. Sounds like 90% of the audio is static and noise. Have tested the HDMI output from the camera and it works fine, my shotgun mic and cable also fine.

Any solutions???

Re: BM Bi-Directional Micro Converter audio issues

PostPosted: Thu Jan 24, 2019 11:05 am
by robwood65
I started a support ticket back in August to try and get some clarity on this issue.
Yes I only get distortion on the right hand channel, the left is clear, and it only happens when sending 1080i50 from the camera, it's not just the A7Sii but also the Sony FS and FS7, they can't all have issues.

Here's what I got back from Blackmagic support.

------------------------------

Hello Robert,

Thanks for you patience on this matter.

The Devs have tested logged this as a bug and are discussing this with Sony on how to resolve this behaviour. It may be something that is fixed in future firmware versions, however I would not be able to put a timescale on how long this may take.

I hope this helps and will recontacting when I have more information on this matter.

Thanks,
Matthew Madeley
Technical Support Consultant
Blackmagic Design



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Nothing since then, I've sort of given up as I don't get the issue with other converters.