Audio/Sound Delay issue with CPSDigi on OMVS

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  • July 26, 2023 at 4:56 PM #57570
    Hiisoka89
    Participant

      Hi there,

      I just tested my neogeo Open MVS with the CPS Digital installed on it, connected to my LG Oled CX tv via HDMI cable, but i got a very weird sound delay; the more play and time passes the more it becomes accurate and noticeable, and as you can see on the video it almost reached 1 seconde of delay which make it impossible to play…

      I tried to connect it using Retrotink 5X with a scart RGB cable + the same HDMI cable previously used with the same Oled tv and it worked without issue.

      Then, i tried to connect the device to my other tv (Samsung LED) using the same cable and it worked flawlessly without any issue.

      Here is the link of the video showing the issue https://youtube.com/shorts/tR7j_5EvzbI?feature=share

      Is this a known issue ?? Is the CPS Digital not compatible with some tvs (oled) ??

      Can anyone help me please ??

      Thank you

      July 27, 2023 at 2:52 PM #57577
      BuckoA51
      Keymaster

        Very strange… do you have the TV set to game mode?

        July 27, 2023 at 3:23 PM #57578
        Hiisoka89
        Participant

          Yes i tried with and without the game mode activated.

          • This reply was modified 2 years, 9 months ago by Hiisoka89.
          July 29, 2023 at 12:24 PM #57599
          BuckoA51
          Keymaster

            Are you using the TV speakers directly or something like Arc/Earc?

             

            July 29, 2023 at 1:07 PM #57600
            Hiisoka89
            Participant

              Tv speakers directly

              August 2, 2023 at 4:56 PM #57645
              BuckoA51
              Keymaster

                Have you checked for a firmware update for the TV?

                August 4, 2023 at 3:47 PM #57658
                Hiisoka89
                Participant

                  The firmware is up to date.

                  August 9, 2023 at 12:06 AM #57688
                  marqs
                  Participant

                    Did you have RT5x in framelock mode when you tested with it? Neo Geo’s lower than usual refresh rate (59.19Hz) might cause issues with some TVs.

                    August 9, 2023 at 11:00 AM #57689
                    Hiisoka89
                    Participant

                      Tbh i didn’t pay attention if it was on framelock but i have to mention that i got a DFO installed as well and the refresh rate is a 59.94Hz

                      Also i live in a country with PAL standards so my TV.

                      August 12, 2023 at 4:37 PM #57742
                      marqs
                      Participant

                        Hmm, I wonder if DFO is causing the issue here since presumably C1 and C2 clocks are no more exactly 12/6MHz with it. Consequently generated audio clock and sampling frequency are not as intended. I’ll need to take a look into details of DFO mod and possibly generate alternative firmware for it.

                        August 19, 2023 at 12:18 PM #57798
                        Hiisoka89
                        Participant

                          Thank you for your reply but it is normal that the setup works just fine with a non OLED model ?? Because with a LED samsung tv there is no issue.

                          August 20, 2023 at 8:19 PM #57810
                          marqs
                          Participant

                            Some displays may misbehave if audio sampling rate is 1.3% too fast, others are able to work with it. I’m now working on a update that adds support for AES and DFO. You can download a work-in-progress version here. From menu, change “XTAL freq” option to DFO.

                            August 28, 2023 at 9:41 PM #57886
                            Hiisoka89
                            Participant

                              How can i install the firmware ? Is there any turorial please ?

                              August 29, 2023 at 8:50 PM #57892
                              marqs
                              Participant

                                You can follow this tutorial as the process is same. For the USB Blaster, you can get the Terasic one or a cheaper clone which are available on Amazon etc.

                                February 10, 2024 at 1:51 PM #60154
                                Hiisoka89
                                Participant

                                  Hi, i just wanted to download this file you linked but the link is not working. Is there any recent version of it ?

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