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Thanks for your reply.
Console type doesn’t matter, you could easily test with no console plugged in at all. Only RT2X to OSSC and that’s it.
Could you test and tell if my VGA converter is the problem, or if this is normal behaviour (which should then be mentioned at the RT2X buying page imo).

And more important at this moment, since my RT2X is constantly losing connection with both my OSSC as well as tv (also even when no console plugged in), how can we solve that?

Thanks.

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Did you already manage to check for noise with the VGA converter setup?

Also, anyone from VGP reading here? I assume when you’re selling this combo, you will at least have tested it yourself. So would love to hear about that.

Then regarding the RT2X being unstable. I have tested again last night with a different HDMI cable, but made no difference as expected.
I have connected straight to my tv, switched it on with no console attached, leaving test screen to test. After a minute or so, connection is lost, it sometimes flashes a few times and then it’s gone. Restarting won’t help. Waiting for 5 minutes and then restarting brings the image back for a minute, then it’s gone again.
So it’s not the HDMI cable, and it’s not my tv either. Because when connected via VGA converter to OSSC, also OSSC loses connection with RT2X regularly.

Only possible issue I can think of would be the included HDMI adapter plug (HDMI 2 micro HDMI). I don’t have any of those plugs or any micro HDMI cables around so can’t test that. But honestly don’t really expect that to be the issue.

Altogether – This is definitely not working, would like to get a decent solution.
Thanks.

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Thanks for the reply Mike.
Just checked your video, and although I might order that HDMI->Component box, I’m a little hesitant as it will make the cable mess behind my tv even bigger, which I’m not really looking forward to 🙂

I understand that it’s not ideal to digitize audio and convert it back again, however if it works it is the neatest option for me atm, and considering the converter was bought with the RT2X, I think I might expect it does work well enough.
Since I assume you’ve tested every possible combination by now – What happens if you use it in the same setup like me (RT2X in pass thru mode -> HDMI2VGA converter with audio breakout -> OSSC). You don’t get that noise? It’s definitely loud enough not to miss it, and a big immediate change when alternating RT2X between 2x and pass thru modes.

Regarding the HDMI cable, it’s a pretty expensive and sturdy one, have never had any issues with it. But it would be the next logic step to check what happens if I change it for another one indeed. Might also be the adapter plug that came with it. Will try and find another one and check.

Another question – What’s the reason for not including a power switch on the RT2X board? I have installed one in the cable now, so not a problem anymore, but it felt like the main missing piece.
Thanks.

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Oh hey it’s back again! Weird weird

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Have performed your test a few hours ago (which resulted in no noise), but ran into much bigger problems which resulted in not being able to use the RT2X anymore at all this evening. Must say the RT2X feels extremely unstable to me.

Steps I took:
First the test. Used my headphones, heard some crackling sounds at first (nothing like the noise described before), then everything became perfectly silent.
Then wanted to do a second test. Unplugged console as it doesn’t seem to make any difference at all to the noise problem. RT2X hdmi to converter, converter not plugged in to OSSC, headphones in 3.5mm jack audio breakout socket. Everything silent. As soon as I plug in the VGA to the OSSC, the audio noise is back, unplug, noise gone, plug back in, noise is there (can’t remember if OSSC was switched on or off).

Then the RT2X image disappears and I can’t get it back. Have unplugged all cables and restarted everything several times, but OSSC does not sync up to the RT2X output at all. I must mention this has happened several other times this week.
I then plug the RT2X hdmi directly into my tv, no image. Unplug all cables, restart, no image. Unplug hdmi from my tv and plug back in, image for 4/5 seconds, then it’s gone again.

And that’s the last of RT2X I’ve seen this evening. Both OSSC as well as my tv have not recognized the image coming from RT2X at all for the past few hours.

As said, this has happened before (not that long though), and from experience I tend to expect that tomorrow it’ll work fine again. But it feels totally random and unstable. No clue what’s going on here…

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When connecting the RT2X directly to my tv in pass thru mode, 240 is interpreted as 480i and there is no audio noise.
Does that tell you anything?

And regarding your other test option, when speaking of the “converter”, you mean the HDMI->VGA adapter right?
Thanks.

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Have tested. As expected, no problems when sending audio directly to OSSC.

Although this is a workaround that works, it’s not ideal in my setup. Also I’m wondering what causes this, and if everyone is having this issue, or if my unit is faulty in some way?
And would there be a way to fix this?

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Will test that tonight, but assuming that won’t give any problems.
When noise occurs, unplugging the VGA output adapter’s breakout audio cable results in no noise (and no sound, of course)

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No, it makes perfect sense, because SCART was designed to carry all of RGB, composite video, and stereo audio, and a good, shielded cable will do that without noticeable interference, which is what the Retro-Access and RGC Packapunch cables will do.

That’s not what I meant. I know Scart is designed to carry all of that signal. I just mean, I can’t think of any reason to not route audio to Scart but to a separate output instead, and then buy a cable to input that same audio again at the console side of the cable.
That doesn’t make any sense to me, it would make the cnoice for a separate audio output instead of audio via Scart a pretty strange one.

Ok, so I’ll just wire audio directly to the DIN and trust that’ll be fine!
Thanks.

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Thanks for the elaborate answer!

I see the Retro Access cables actually input the audio at the console side, which absolutely makes no sense if you’ve decided to go for a separate NES audio output. However, that Scart adapter you’ve linked to, that might actually be a great solution.
Also, I read in the Retrogamingcables Pakapunch product description (that’s the cable I’ve bought) that there should be enough shielding to route audio through the cable anyway.

So what I’ll probably do, is route the audio through Scart, but via a switch, so I can switch it off whenever I feel the need to use an external audio cable anyway.

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@harrumph Thanks for your clear explanation! I thought the active lines where the actual lines outputted, I now understand it works differently.

I have done that last test I mentioned, with another console on my tv, but still the same problem. So getting another tv will be the only solution.
I’ll check the compatibility list. Make sure to put mine on that proud #1 spot of tv’s incompatable with line doubling 😉

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I’d recommend getting a supergun. You can hook your JAMMA board to scart input without external devices as well, but you’ll then probably need pots on RGB lines and ~470ohm series resistor on 5V TTL sync line.

Thinking of consolizing an MVS, and have read about making sure not to damage the OSSC when hooking it up without a supergun.

In some topic I’ve read that you could also output the video to a din socket, and then use one of these Pakapunch cables (https://www.retrogamingcables.co.uk/sega/mega-drive-2/sega-mega-drive-2-sega-genesis-2-rgb-av-scart-cable-tv-lead) that have a built in 470 ohm resistor on the sync line.

When choosing this route, would the OSSC be safe?

I have also read about the amped audio output possibly being unsafe for OSSC. Is that true?
Thank you.

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Have none that I can test, don’t know anyone with an NTSC console around.

Have just thought about one last thing to test, don’t know if it makes sense:
Have tested all of my equipment on a friend’s tv, and it was fine, so concluded the tv is the problem. But thinking about it now, technically I guess that it could still be possible that my console outputs a messy signal, which my friend’s tv handles well, but mine doesn’t. So as a final test I’ll hook up his console to my tv tonight and see what that does.

@BuckoA51 Seeing the number of created replies on your profile, I’m assuming you know your shit 🙂 And reading your reply, am I assuming correctly that you don’t think there’s anything setting related that can solve this?
Thank you.

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Have just spent another hour or two updating firmware, trying to make Line3/4/5x modes work, only trying to get a stable image. But I feel I have ran out of options now.

Anyone who can help me out?

In the tv compatibility thread, I’ve read that áll tv’s are expected to support Line2x Mode, and only 3 reports of problems (and those are with SNES).
I can hardly believe I’m “lucky” enough to be the owner of the first and only tv to not support Line2x Mode? 😐 I own a nearly 10 year old LG, 32LC52…..

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[EDIT- Lots of testing today made this post useless, reply based on today’s outcome below]

So apparently it’s my tv causing all the flickering in Line2x mode. Using my own console, my own game and all of my own cables on my friend’s tv resulted in a perfect image.
Are there any settings in OSSC (cause there are none in my tv) that could possibly solve this? Or could Line3/4/5x mode (after some tweaking, if I can get it to work at all) be a solution? Or would buying a new tv really be the only option left for a good image?

.
Thanks for your reply Harrumph! I don’t think I fully understand the matter still however.
On my friend’s tv I noticed the OSSC outputs a 2×288=576p image, resulting in mentioned bars on top and bottom. Is there a way to force OSSC to output a multiplication of 240p instead of 288p? Cause if I remember correctly, after changing the v.active setting, it was still outputting 2x288p according to the info displayed on the tv (I’m not 100% sure though..)
If a 240p multiplication could be forced, those annoying bars would be gone and I’d have the full beauty of the game displayed across my tv vertically, right?

Thanks 🙂

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