[LaminGaming]

Also, do you have any recommendations on where to get a replacement of the PCM1862? I also live in the UK if that helps.

[LaminGaming]

Yes, it’s a v1.6 board. Thank you for letting me know that it’s most likely the PCM1862, I guess I’ll have to try replacing it with a new one at some point. However, I did have the thought of maybe trying to somehow bypass the audio input for the AV2 and use the AV3 audio input instead, as I never use VGA with anything. Though, I wasn’t sure if that was possible. Replacing the PCM1862 is probably easier.

As for why the sound issue happened in the first place, I think it’s because of the faulty Mega Drive 1 I was testing that had a missing right FM channel from the YM2612 chip. So maybe that somehow affected the OSSC.

[LaminGaming]

@marqs: Sorry to ping you, but would you happen to know what’s going on with my OSSC?

[LaminGaming]

I’ve replaced R49 and C125, but nothing changed. The only other thing it could be is possibly the sound chip (PCM1862).

[LaminGaming]

I still can’t work out what the issue is, so I decided to get some sound recordings directly from the OSSC to share what I’m talking about:

• NORMAL.wav – Is using stock settings.

• CHANNELS SWAPPED.wav – Has only “Swap left/right” turned on.

• MONO MODE.wav – Has only “Mono mode” turned on.

https://drive.google.com/drive/folders/1RH31R0fcuK88GHWqHAbth2o4oX4zhUQO?usp=sharing

I’m thinking maybe it’s an issue with something on the OSSC’s board, a faulty resistor or cap perhaps?

Edit: I used my audio probe and found that R49 and C125 (left channel) are quieter than R51 and C123 (right channel), so maybe R49 or C125 is the culprit… I also found that switching the jack switch to Av1 OUT had no issues

• This reply was modified 6 months, 1 week ago by LaminGaming.

[LaminGaming]

@marqs I’ve finally been able to get the N64’s 480i to display a picture with the new firmware. Connecting the composite RCA to the Y (green) RCA input on the OSSC says 480i is 525-i at 61.14 Hz. So it was definitely an issue with the Koryuu, I’ll try updating the firmware when I can, to see if that fixes the issue.

Another issue: I’ve noticed that there is an issue with 480i at 4x, the resolution switches to 1280×1920 instead of being 1280×960 when I change the “H. s.rate frac”. Not sure why this happens, but I thought to let you know.

[LaminGaming]

Yeah, it says 525-i and there’s no light in any multiplication mode. If it was working, the green light would be on. This is how I know it isn’t my TV not accepting the signal. I also tested it through my Cam Link into OBS, as that’s been very reliable with everything I’ve tried, though unfortunately with the same results – not receiving a signal. So I know it’s an issue specific to the OSSC, but I don’t know what is the cause. Unless it’s got something to do with the Koryuu Transcoder in some way, like maybe it needs to be updated, as I recall the update fixed a couple of bugs. The N64 is the only console I have hooked up through the Koryuu, so that could be a reason. But it still doesn’t explain why it worked with v0.90.

Known issues with the Koryuu: https://junkerhq.net/xrgb/index.php?title=Koryuu#Known_issues_.2F_limitations

Edit: I realised it actually says 262-p for 480i, and then switches to 263-p for 240p, so it isn’t 525-i. The OSSC might be misinterpreting the signal as 240p maybe.

• This reply was modified 8 months, 1 week ago by LaminGaming.

[LaminGaming]

It’s strangely only the N64, I’ve tested the PS2 and Wii in 480i/576i with no issues. Even the interlaced mode (320x448i) for the Mega Drive works – when H-PLL Pre/Post Coast is set to 3. I’ve also tried different multiplication modes with generic and optimised settings but nothing seems to work.

[LaminGaming]

I’ve just tried v1.09, unfortunately it seems to have not improved the compatibility with 480i on my N64. I am wondering if it could have something to do with using the EverDrive-64 X5 for running NTSC games on PAL N64’s, as the refresh rates are slightly different: 240p is 61.02Hz instead of 59.82Hz, and 480i is 61.26Hz (I don’t know what it is for an NTSC N64). However, as I’ve said in my previous post, it worked on v0.90, so I’m not sure why it doesn’t work with v1.09. Do you have any issues with 480i on N64?

[LaminGaming]

After some time testing with v1.08, I wanted to say that everything is working great in my setup, 6x (1440p) in particular is fantastic! I’ve tested a variety of different consoles in generic 4:3 and optimised modes up to 6x with no issues. The only issue I came across was 480i from the N64; it doesn’t seem to display a picture no matter what I do. Which is odd, as it did used to work with v0.90, though even that firmware had issues. In v0.90, it would only display a picture if I had 240p set to 3x (with 480i set to 4x) or when you press the “LINEMULT. MODE” button on the remote.

Also, there was a minor issue only when using 6x at 60Hz with my region modified PAL Mega Drive 2. There was no sound, and the image had a pink tint when set to YCbCr444 – not sure why?

• This reply was modified 8 months, 2 weeks ago by LaminGaming.

[LaminGaming]

I just checked 1.04 and it has no issues with limited range.

[LaminGaming]

Here’s a screenshot of what I was talking about, the image has a pink tint when setting it to YCbCr444. Which is strange, as it didn’t do this on fw 0.90.

FW 1.06:

FW 0.90:

[LaminGaming]

Hi Marqs, I thought I’d let you know that firmware 1.06 is working great on my OSSC 1.6 after doing the HW mod. The only things I noticed that weren’t working correctly was setting the sampling phase for optimised modes, and setting TX mode to YCbCr444 (limited range).

The phase seems to only have 4 set values that you can cycle through regardless of changing it from 0-348 deg. And limited range now just displays a pink tint over the image.

Also, setting the phase seems to be inconsistent and shifts from sharp to blurry at varying degrees when you change the horizontal backporch. I haven’t had a lot of time to test things thoroughly, but these are just a few things I noticed.

I suppose the only other thing is that for Line6x you can’t select it using the hotkey for LINEMULT_MODE on the remote, so you have to go into the output settings instead, though that’s very minor.

Edit: I think the phase isn’t being displayed correctly until you adjust the horizontal backporch, that’s why it seemed inconsistent. Though I have no idea why this is the case.

I took two screenshots in Line6x of Spyro 1 running on my PS2 Slim as an example. In the first screenshot, I set the phase to 0 deg but you can see some faint artefacts. And then in the second screenshot, I adjusted the horizontal backporch (changing it to 89 and back to 88) and the artefacts are gone, with the phase set correctly. Which is odd, as the settings for both screenshots are exactly the same, so there shouldn’t be any differences between them – I never had this issue on the 0.90 firmware.

Screenshot 1:

Screenshot 2:

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