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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

Spyro 2 and 3 Audio Issue with PSX Emulator

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spyroaudio problemspsx
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  • Q
    quicksilver @FrenchAussie
    last edited by 17 Dec 2018, 14:49

    @FrenchAussie are you using your TV's built in speakers or a different setup?

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    • F
      FrenchAussie
      last edited by 17 Dec 2018, 15:38

      I used the built in speakers for two TVs.

      Oh I forgot to mention, I also tried different games of course and they all work fine (Crash, Croc, Tekken 3)

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      • M
        mitu Global Moderator
        last edited by 17 Dec 2018, 17:24

        Are you using the standalone pcsx-rearmed or the Libretro based core (lr-pcsx_rearmed) ? Do you have Enhanced graphics turned on ?

        F 1 Reply Last reply 17 Dec 2018, 22:26 Reply Quote 0
        • F
          FrenchAussie
          last edited by 17 Dec 2018, 21:57

          It's the standard PCSX ReArmed r22 - version 1.7.5.

          Turning off the enhancers also causes the same issue.

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          • F
            FrenchAussie @mitu
            last edited by 17 Dec 2018, 22:26

            @mitu so sorry, I just realised I checked in the wrong place. It's in my retropie installs so it's the lr-pcsx-rearmed version

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            • M
              mitu Global Moderator
              last edited by mitu 18 Dec 2018, 05:22

              I gave it a try on my PI3B with Spyro 2 and I don't get any sound "popping". Used the same BIOS (scph1001), but this doesn't seem to make a difference. Is the sound problem always present or does it appear on/after certain parts of the game - I only played around the 1st level for about 20 min ? I've used a .bin/.cue (redump validated).

              F 1 Reply Last reply 18 Dec 2018, 07:39 Reply Quote 0
              • F
                FrenchAussie @mitu
                last edited by 18 Dec 2018, 07:39

                @mitu it happens all the time during gameplay. every time i start running around a lot and the scene is changing fast that's when its more likely to 'pop'. And yeah only with those two games. Just tried Ape's Escape and everything was fine with that game too

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                • P
                  pjft
                  last edited by 18 Dec 2018, 09:29

                  So, I'm trying it out, played for a few minutes after the intro and I get no meaningful popping as well. I lost audio halfway through the intro, interestingly. But skipping the intro I got audio back.

                  I'm on lr-pcsx-rearmed r22, it seems, under RetroArch 1.7.1?

                  Potentially relevant:
                  Quick Menu > Options:

                  • Vibration: disabled
                  • Sound: Reverb: enabled (default, I think)
                  • Sound: Interpolation: off (default, I think)

                  Settings > Audio:

                  • Volume (dB): 0.0
                  • Mixer: 0.0
                  • Audio Sync: On
                  • Latency: 64ms
                  • Resampler Quality: Lower
                  • Dynamic Audio Rate Control: 0.005
                  • Audio Max Timing Skew: 0.05
                  • Output Rate: 44100

                  Settings > Driver:

                  • Audio driver: alsathread
                  • Audio resampler driver: sinc

                  Alternatively, if you have a spare SD card around, I'd start from a fresh image and see if it works well. It might be something with a recent RetroArch or emulator update?

                  F 1 Reply Last reply 18 Dec 2018, 12:01 Reply Quote 0
                  • F
                    FrenchAussie @pjft
                    last edited by 18 Dec 2018, 12:01

                    @pjft Thank you so much! I have found the problem thanks to you! Sound: Interpolation was set on 'simple'. I'm not sure if this is the default version of 1.7.5 or whether I clicked it by accident but either way its now set to 'off'. I'm so thankful! I've been at it for 3 days!

                    H 1 Reply Last reply 18 Dec 2018, 13:49 Reply Quote 1
                    • P
                      pjft
                      last edited by 18 Dec 2018, 12:03

                      @FrenchAussie glad to hear that worked.

                      A question, while we're at it -- does your sound cut off in the intro (when the "bad guy" shows up complaining that they brought a dragon over or something - I'm not familiar with the lore here :) ) in the USA rom?

                      Thanks.

                      F 1 Reply Last reply 18 Dec 2018, 12:16 Reply Quote 0
                      • F
                        FrenchAussie @pjft
                        last edited by 18 Dec 2018, 12:16

                        @pjft yes it does. from what i've been reading on the forums, it seems like everyone with USA rom versions has this issue. Not sure about the EU version i only tested the gameplay with it.

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                        • P
                          pjft
                          last edited by 18 Dec 2018, 12:20

                          @FrenchAussie Thanks - good to know. I won't worry about it then.

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                          • H
                            hhromic @FrenchAussie
                            last edited by hhromic 18 Dec 2018, 13:49

                            @FrenchAussie said in Spyro 2 and 3 Audio Issue with PSX Emulator:

                            @pjft Thank you so much! I have found the problem thanks to you! Sound: Interpolation was set on 'simple'. I'm not sure if this is the default version of 1.7.5 or whether I clicked it by accident but either way its now set to 'off'. I'm so thankful! I've been at it for 3 days!

                            According to the libretro docs the default is set to simple for the lr-pcsx-rearmed core (is not a general RA option):

                            Sound: Interpolation [pcsx_rearmed_spu_interpolation] (simple|gaussian|cubic|off)
                            Modify sound interpolation.

                            I'm curious if the sound quality suffers noticeable when disabling the interpolation? Do you notice any perceptible (audible) difference?

                            F 1 Reply Last reply 18 Dec 2018, 14:39 Reply Quote 0
                            • F
                              FrenchAussie @hhromic
                              last edited by 18 Dec 2018, 14:39

                              @hhromic a little but its nothing major. when spyro jumps, there's a slightly higher pitch in sound but this is nothing compared to the 'pop' sound i was getting. spyro 2 definitely cannot have enhanced graphics as it messes up with a few things. overall, a very sensitive game to modification.

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                              • H
                                hhromic
                                last edited by hhromic 24 Jan 2019, 10:39

                                Update

                                A pull-request (PR) has been submitted to the upstream pcsx_rearmed core that improves the gaussian audio interpolation algorithm. If/when this PR gets merged, maybe you can give another try to Spyro 2/3 and see if the sounds doesn't crack anymore and the sound quality improves thanks to the interpolation. Hopefully gaussian interpolation is not so taxing to the RPI.

                                Ref: https://github.com/libretro/pcsx_rearmed/pull/218

                                1 Reply Last reply Reply Quote 0
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