Getting Audio out of Flame

Flame Hardware Questions
1

Hello Everyone,

Just upgrading my reference monitor to handle UHD over 12G SDI. Unfortunately I was using a 3G SDI to Audio mini convertor from BM to de-embed audio in my old setup, which I’m assuming will no longer work.

My new FSI monitor WILL de-embed and send Ch1/2 audio out via an onboard 1/8" stereo mini but that’s introduced a bunch of hum/noise as soon as I convert it to mono 1/4" and feed it into my little Mackie monitor mixer.

So I was trying to see if there was another way to do this with without having to buy an AJA 12G-AM for 1400 (or trying to figure out where the noise is being introduce in my home office which may be near impossible given the existing electricity situation I’m dealing with).

Any thoughts on another way to handle this? Seems like it shouldn’t be this hard, but alas, here we are.

Thanks in advance for any thoughts you may all have,

David

2

Ps - I’m handling audio and video IO with a Kona 5 on Linux

3

Can I use the hdmi to de-embed the audio while feeding my monitor SDI for video? Does Kona 5 flame route both signals simultaneously?

4

One thing to try - doesn’t the Kona card have a I/O port which gives you 8ch AES audio. Then feed this through a more affordable AES/analog converter into your mixer. Gets the audio chain away from the 12G signal. Or your mixer may even have an AES input.

I would assume, but worth validating that the audio channels are active under Flame.

5

Depending on the FSI monitor you have now, some of them have the ability to take the 12g signal and then spit out a downconverted 3g signal. Just using that loop out for audio de-embedding should work.

Flame will kick the signal out through the BNC and HDMI from the KONA 5 simultaneously, so that is another option if you don’t have long cable runs to worry about.

6

Thanks for the suggestion! This was actually my first idea, but unfortunately there are very limited number of AES to analog converters that I could source, and most of them would require several adaptors to get from the BNC out of the Kona5 cable bundle to my mixer’s required 1/4" inputs.

It might wind up being my plan B though.

7

Thanks for the response! Unfortunately we went with the C class of their OLEDs which don’t have the down convert option. I was looking into this as well. The SDI out is just a loop of the 12G input.

I’m going to start with a 4k HDMI audio extractor from Amazon. They all receive pretty mediocre reviews, but hopefully since I’m just trying to de-embed a straight LPCM stereo 2ch out (and not messing with EDID/Dolby/etc) they will do the trick reliably enough.

I can update the post as to my success in case anyone in the future ever finds themselves in a similar situation.

Thanks again for the help!

8

For anyone interested, I purchased a $35 OREI 4K 60Hz 18G HDMI 2.0 Audio Converter Extractor from Amazon and took the 1/8" analog stereo out to feed my little monitor mixer. 12G SDI is just feeding video to my Flanders. All seems to be working fairly well at first listen - without the noise I was getting from the Flanders de-embeded audio out jack.

Will test the sync when I get a chance. But as of now, if you’re looking to get audio out of a Kona 5 without relying on expensive 12G SDI dedicated de-embeding hardware, this appears to be a viable option,

Thanks everyone for the suggestions!