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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    lr-genesisplus-gx audio problem on Retropie 4.7.1

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    audiogenesisgenesisplus-gxmegadriveretropie 4.7.1
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    • mituM
      mitu Global Moderator
      last edited by

      @rek607 said in lr-genesisplus-gx audio problem on Retropie 4.7.1:

      I only find that megadrive's audio is not working correctly and there's about 15 fps fall. I don't even know if these two problems are linked (?).

      I don't think the issues are linked. Can you get a Verbose log from running a game with lr-genesis-plus-gx and post the log on pastebin.com ?

      1 Reply Last reply Reply Quote 1
      • REK607R
        REK607
        last edited by

        Thank you @mitu for your interest :-) It's my first time creating and sharing a verbose log, but I think I've done it properly as you can see here. I tried Sonic & Knuckles game for the test and it's moving at 50-60fps, audio was OK until the game started and you run for rings, jumping platforms and enemies.

        1 Reply Last reply Reply Quote 0
        • mituM
          mitu Global Moderator
          last edited by

          Try removing your shader preset for the core and see if you still get the same slowdown.

          1 Reply Last reply Reply Quote 2
          • REK607R
            REK607
            last edited by

            It worked! So were there many shaders then? I still preserve the content directoru ones and it's working smooth and fine.

            dankcushionsD 1 Reply Last reply Reply Quote 0
            • dankcushionsD
              dankcushions Global Moderator @REK607
              last edited by

              @rek607 we can't see what shader you have active but from the pragmas it looks like lcd_zfast. lr-genesis-plus-gx is particularly bandwidth expensive so it's unlikely to work well with any shader. if you change your genesis/megadrive emulator to lr-picodrive it should be able to handle a shader.

              1 Reply Last reply Reply Quote 1
              • BuZzB
                BuZz administrators
                last edited by

                Can lower your output resolution also - I run at 720p on my 1080p screen and use a scanline shader. I actually think it looks better actually, with the scanlines applied at that resolution and then upscaled. This obviously depends on your screen, but it may be a good compromise.

                To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

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                • BuZzB
                  BuZz administrators
                  last edited by BuZz

                  I also wrote this before checking your log. Looks like you may already be running at a lower res - should have checked that first. Having said that I'm sure I've been running this emulator with zfast scanline shader myself without issue but will check (on RPI 3).

                  To help us help you - please make sure you read the sticky topics before posting - https://retropie.org.uk/forum/topic/3/read-this-first

                  REK607R 1 Reply Last reply Reply Quote 1
                  • REK607R
                    REK607 @BuZz
                    last edited by REK607

                    @buzz thing is on Retropie 4.6 I had not a single issue with shaders or even sound quality, while on 4.7.1 I had to lower these specs in order to make it run and sound smoothly. I'm now testing this on Mega CD and I had to remove shaders, bilinear filtering and put sound quality to normal (then exit the game and run it again), that solves the problem. Is there something else that can be done maybe? As I say on 4.6 I had no issue with my favourite audio and video presets.

                    1 Reply Last reply Reply Quote 0
                    • mituM
                      mitu Global Moderator
                      last edited by

                      I don't think it's a RetroPie version issue - more likely an emulator update between 4.6 and now that changed the performance of lr-genesis-plus-gx. Do you have the same slowdown with lr-picodrive ?

                      REK607R 1 Reply Last reply Reply Quote 1
                      • REK607R
                        REK607 @mitu
                        last edited by

                        @mitu that makes sense indeed. lr-picrodrive runs flawlessly as always and is my B plan if I can't solve the issue.

                        dankcushionsD 1 Reply Last reply Reply Quote 0
                        • dankcushionsD
                          dankcushions Global Moderator @REK607
                          last edited by

                          @rek607 note that picodrive was the default genesis/megadrive emulator until February this year, so genesis-plus-gx was default in 4.6, but if you updated to 4.6 from an earlier version, you may have been using lr-picodrive.

                          REK607R 1 Reply Last reply Reply Quote 1
                          • REK607R
                            REK607 @dankcushions
                            last edited by

                            @dankcushions yes! I did the change when I found this new emulator was ported to libretro. At the end I found that the main problem in my lr-genesis-plus-gx performance is the bilinear filter. If I turn it off it's working 58-60 fps with very good sound quality. So as I see it maybe I overloaded my raspberry pi 3B too much, if I'm correct is definitely something to have in mind if you dont have a rpi3B+ or rpi4. SegaCD is working fine too now!

                            1 Reply Last reply Reply Quote 1
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