[spacetime66]

So far I’ve been able to 960x540p60hz working properly with 1 Sony Sony KV-34XBR910 (DVi and Component), 1 Sony KV-30HS420 (Component only) and 2 Sony KD-34XBR960 (Component only)

Here is The timing Output OPT >ADV DISP Timings = 480p Timings for the OSSC Pro:

 

Horizontal:

H. Total = 1216

H. SyncLeg = 24

H. BackPorch = 164

H. Active = 960

Vertical:

V. Total = 562

V. SyncLeg = 5

V. BackPorch = 14

V Active = 540

Output OPT >ADV DISP Timings> Def RFR Rate = 60.00

Output OPT >ADV DISP Timings> Def RFR Rate Frac = 60.00

Output OPT >ADV DISP Timings>Display AR H = 16

Output OPT >ADV DISP Timings>Display AR V = 9

here are those timing for CRU for windows:

 

Horizontal:

Active = 960

Front Porch = 68

Sync Width = 24

Back Porch = 164

Blanking = 256

Total = 1216

Sync Polarity= –

Vertical:

Active = 540

Front Porch = 3

Sync Width = 5

Back Porch = 14

Blanking = 22

Total = 562

Sync Polarity= +

 

 

[spacetime66]

Okay I’ll try adjusting the H.total next time I’m at my friends house who has Sony HD CRTs as my last working Sony HD CRTs just died but I’m going to try getting it fixed as soon as possible

[spacetime66]

okay cool looking forward to update

[spacetime66]

I recently borrowed my friends regular OSSC classic and when enabling freesync flag on the OSSC classic it worked with my LG CX where as with the OSSC Pro with firmware v0.77 it doesn’t.

[spacetime66]

According to the Rtings LG CX TV review that VRR reduces latency about .8ms~ (5.9ms) over 120Hz fixed refresh rate (6.7ms)… It’s not clear if those gains are only for sources outputting 120fps or if there would be gains if VRR was matching 60 fps… I think if your source is set to output 120hz and your games is running at only 60fps and your monitor is in VRR mode so it technically running at 60hz but you have the display lag of 120hz at least that what read on the blur busters forums… Is It possible to spoof 120hz VRR output mode and then have VRR match the source refresh rate at 1080p and possibly 1440p or 2880x2160p on the OSSC Pro… I was able to get GSYNC working with my LG CX when I used my friends computer with easy so I don’t know why freesync isn’t working coming from the OSSC Pro… I’m hoping to reduce input lag as much as possible

Rtings LG CX review = https://www.rtings.com/tv/reviews/lg/cx-oled

Blur buster forum post about VRR lag = https://forums.blurbusters.com/viewtopic.php?t=7801

[spacetime66]

I guess the LG CX TVs got worse at 1440p with firmware updates because according to the Rtings review on 06/15/2021 the input lag between 1080p, 1440p and 4K were virtually identical at about 13ms in the middle of the screen in game mode. https://www.rtings.com/tv/reviews/lg/cx-oled

[spacetime66]

Okay so I got a TOSLINK to RCA converter from amazon and it has fair quality but could be a lot better though… I can wait for the TOSLINK in to Extra AV audio out functionality… hopefully when the OSSC Pro gets the functionality it will result in better audio quality than the cheap converter I got off of amazon https://www.amazon.com/dp/B0BRFVMCJV?psc=1&ref=ppx_yo2ov_dt_b_product_details

[spacetime66]

after playing around more with settings I think H output timings is what determines aspect ratio if you have a fixed output resolution

• This reply was modified 12 months ago by spacetime66.

[spacetime66]

So it sounds like A-LM 480p to 1080i is actually the wrong aspect ratio then as I’m actually using custom timing to output 854×480 in a 960×540 window with A-LM 480p passthrough and 480p to 1080i looks thinner than 480p passthrough to 854×480… I compared the Shenmue PC port set to 4:3 and compared to the Dreamcast outputting 480p passthrough to 854x480p on the HD CRT and it looks like the same aspect ratio…

[spacetime66]

This particular color issue is A-LM 1920x540p via HDMI not component

[spacetime66]

yeah that did the trick

[spacetime66]

So if I divide the timings by 2 for 1920x540p A-LM in the output advanced timing the brightness seems okay but the the image is stretched which I think is expected

the timing H timing dived by 2 is:

Horizontal:
H. Total = 1100
H. SyncLeg = 22
H. BackPorch = 74
H. Active = 960
but if I use the the timings I originally used in my first post with 1920x540p A-LM the brightness is blownout

the old timings

Horizontal:
H. Total = 1216
H. SyncLeg = 96
H. BackPorch = 128
H. Active = 960

[spacetime66]

Are you sure the HDMI TX chip isn’t doing something similar? because when I used my Tendak hdmi to vga transcoder via vga in on the ossc pro and ossc pro’s hdmi out 1 above black was clipped but when I used my Tendak hdmi to vga transcoder via vga in on the ossc pro and vga out via extra av out board on the ossc pro the clipping was gone…

[spacetime66]

Does the YPbPr via the Extra AV out output Rec. 601 or Rec. 709? Does automatically switch based on output resolution? Does it even matter which one it outputs in?

[spacetime66]

I just tried an Tendak hdmi to vga apater with input AV3 with full range rgb set in nvidia control panel and VGA out via the extra av out board and one above black in the Lagom LCD Black level test is now clearly visible when the brightness is raised on PC CRT moniitor… if I use hdmi full range in and extra av vga out one above black is clipped and If I use Tendak hdmi to vga with AV3 input and hdmi out full range one above black is also clipped… maybe the slight black crush is due to the HDMI DACs?

• This reply was modified 1 year, 2 months ago by spacetime66.

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