Delaying the audio would be most gracefully handled within the Atem Minis, as they are already cabable of handling this task (currently on the mic inputs only) without the need of external audio delay units. There is no conversion whatsoever taking place inside these audio embedders when fed with digital audio. I'm just saying that there would be an easy (and cheap) way to get rid of any grounding issues and retain pristine audio quality bypassing the Atem Mini's mic inputs and audio conversion stage alltogether by using a digital to digital HDMI audio inserter. Pro A/D converters alone cost a lot of money. I fully understand that for this price range, and in addition to the already mind-blowing feature set we cannot have pro quality audio as well. This is by no means badmouthing the Atem Mini hardware. We use pro quality analog to digital converters, mix live music and audio with pro quality gear, that's then fed to Atem Mini's consumer quality mic inputs and A/D converters. However these cost money and the other main point was to avoid audio quality degradation. There are ways around this of course, for example using a hum eliminator like Howard mentioned above. We could of course use a separate digital to analog converter right before the Atem Mini, but that does not change the fact that unnecessary D/A + A/D convertions take place here, and again this introduces the possibility of grounding issues. It simply inserts the audio to the HDMI stream (replacing the audio fed to it's HDMI input alongside video), so video signal from HDMI cameras will always be delayed compared to directly fed audio. If a mic is plugged directly to a camera, the audio is delayed the correct amout inside the camera already so it's in sync when fed out from the camera's HDMI output.Īudio to HDMI embedder / inserter does not delay audio. That's exactly why we have the option to add delay to mic inputs in the first place. (unless ran through plugins that introduce latency). Audio from a mic / digital mixer console / audio interface usually is not. HDMI video output from a camera is always delayed. Thank you for your work, and hopefully you'll be able to make this happen.įrank Engel wrote:If I am misunderstanding and the different processing path you are taking is causing the audio to get ahead of the video, a workaround while waiting for this might be to de-embed the audio close to the switcher and bring it into one of the analog inputs which does have a delay.Īnother option would be to place an audio delay unit before the HDMI embedder. Just add the option to select which ones. In case there's not enough horsepower for this in the hardware, I'd really be ok to be able to delay two audio inputs only. However using this method will of course offset the audio, and currently there's no way to fix this inside the Atem Mini's internal mixer. We could easily go around this issue by using optical S/PDIF audio together with an audio to HDMI embedder, effectively adding galvanic isolation and bypassing unnecessary D/A and A/D conversions. The ground noise can get really loud with these Minis. Probably due to grounding issues and the fact that the mic inputs are unbalanced. I've been having problems on multiple locations when connecting external audio to my Atem Mini & Atem Mini Pro ISO. However, I really hope you can add the same adjustable audio delay feature for HDMI inputs as well.įor me, the main reason for asking this is to get rid of mic/audio input interference and noise issues. It's great that we have the option to add audio delay to mic input signals on the Atem Mini series.
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