OSSC Audio Output too loud

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  • March 26, 2021 at 5:59 PM #46213
    husan93
    Participant

      Hi guys,
      so recently I noticed while playing N64 that the sound clips in certain loud scenes. However, the audio from the 3.5mm jack is fine.
      My OSSC was ordered from here and has the audio expansion with DVI.
      I don’t know if the audio is too loud with other consoles, but I would guess so. Is it possible to adjust the volume of the digital audio output in any way?

      March 26, 2021 at 7:48 PM #46218
      Fnnrqwin
      Participant

        Go to the audio options in the settings menu and adjust Pre-ADC gain. Some consoles are just much louder than others.

        April 1, 2021 at 9:52 AM #46394
        husan93
        Participant

          Finally got around to try it out.
          Adjusting the Pre-ADC gain had no effect at all. It didn’t matter if I set it louder or quieter. I dindn’t hear any difference and the audio clipped like before.

          April 2, 2021 at 10:51 AM #46422
          BuckoA51
          Keymaster

            Update to the latest firmware, there were some audio fixes a while back.

            April 2, 2021 at 11:02 AM #46426
            husan93
            Participant

              I have the current firmware (0.88a) on my OSSC.
              I always keep my OSSC up-to-date. 🙂

              April 4, 2021 at 11:27 AM #46457
              BuckoA51
              Keymaster

                You got me stumped then 🙁

                May 17, 2026 at 10:22 AM #69467
                osscboy
                Participant

                  ~Sorry for the necro bump~

                  Hey husan93, I know, this thread is 5 years old by now…and maybe you aren‘t even frequenting this board anymore, but I figured it‘s worth a shot:

                  I think I got the same problem that you describe when downscaling to my CRT TV:

                  Sound, more specifically bass clips after a certain loudness/deepness threshold. The pre-gain setting of the Ossc Pro is already set to -12, but regardless of where it‘s at, I couldnt discern any difference, whether it be -12, 0 or +12.

                  Also tried turning my PC way down and my TV up to compensate but that didn‘t solve it either: Clipping persited and humming was added.

                  So I figured maybe the speakers of the TV really are broken instead, but connecting my original PS2 disproved that, it still sounds excellent.

                  So maybe the OSSC Pro might be outputting too loudly in general, the 3,5mm jack of the Extra AV extension is broken, its the Mr Pi VGA to Scart cable, I couldn‘t figure it out yet.

                  So my question, did you ever solve this problem? Or anyone else for that matter?

                   

                  May 17, 2026 at 10:36 AM #69468
                  BuckoA51
                  Keymaster

                    We do now know that the N64 outputs audio that is too loud/over amplified by default as this caused an issue recently with the Morph, so the issue really is a design fault in the N64 but of course that’s not much help knowing that now not like Nintendo are going to fix it.

                    I don’t know why the gain settings aren’t seeming to affect it but I do know we solved the issue on the Morph by simply adding an inline 3.5mm volume control to the N64s output – https://videogameperfection.com/products/3-5mm-volume-control/

                    That’s easy to do with s-video or composite not so easy if you’re using SCART however we have had a solution for SCART for some time there were just delays getting it to fab, I’ll update here when it’s available.

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