Sound effects keep popping and scratching on ppsspp and linux. about openbor HOT 20 OPEN

PSP support is dropped, upcoming versions won't compile a PSP build at all. @msmalik681 can you reproduce this issue on Linux?

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Is linux supported? Yesterday, I tried and failed to build it on gentoo linux. Lots of compiler errors.

I want to make a gentoo linux package for OpenBOR, but there is no the build instruction apart from build.sh.

I wish the build was done by meson. Meson has a lot of inflexible assumptions, but it is easy for package maintainers to use.

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By the way, I'm going to configure pipewire which emulates ALSA and pulseaudio.

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@amano-kenji I have tested both platforms and they work as expected is there a particular game this is happening with or does it happen with all games ?

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So far, I have tested

• Rhythm of Destruction 2 - Street Fighter Edition
• World Heroes Supreme Justice Extra

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I just tested Streets of Rage 2X. It doesn't give me pops and scratches. It's weird.

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Just tested "Rhythm of Destruction 2 - Street Fighter Edition" using latest stable appimage on linux mint 21 and no sound issues this could be a problem with your audio drivers.

If you have a sound card and a gpu that supports audio over hdmi maybe test both.

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The system sound volume should be 100%. Reduce SFX volume and music volume to 0, and then increase them gradually.

When SFX volume and music volume are near 0, I hear pops before and after sound effects occur.

Test World Heroes Supreme Justice Extra, too.

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I tested onboard sound card and USB DAC with ALSA. With or without ALSA dmix, I hear pops.

Pops become louder if in-game SFX volume is near 0.

I haven't tested pulseaudio or pipewire, yet.

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I guess the root cause is internal audio mixing is broken.

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I tried Golden Axe Returns with the Windows version run with Wine, and it looks to be a regression. With the bundled GAME.exe, it works fine. If you use the included alpha 4.0 GAME.exe, the issue appears. I also compiled the git Linux version (after disabling some fatal warnings) and the issue persists.

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@aqxa1 what distro are you using ?

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Gentoo as well. I needed to add to CFLAGS:

-Wno-address -Wno-stringop-overflow -Wno-stringop-truncation -Wno-format-overflow

Something like this as a full command:

  CFLAGS="-march=native -O2 pipe -Wno-address -Wno-stringop-overflow -Wno-stringop-truncation -Wno-format-overflow" ./build.sh 4

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I think i need to test a linux distro running alsa audio as mine uses pulseaudio i will test and get back to you.

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I'm using Pipewire (through pipewire-pulse emulation). The issue will be reproduced with native Pulseaudio as well I suspect.

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I just tested openbor with pipewire-pulse. The issue still persists with pipewire-pulse.

Even disabling USB device suspend in wireplumber doesn't fix this issue.

I think it's internal mixing issue.

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Hello. I have the same problem with OPENBOR using WINDOWS 7 32 bit. I have tested many versions. In most games even putting BGM and sound effect at ZERO theres still a clicking-pops-noise that is extremely annoying. Sadly i havent found any solution or workaround.

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Can confirm the popping sound effects occur on the most recent Linux AppImage build, on steam deck. Interestingly, I have run into popping sound effects much like this on various Doom source ports on Linux and I'm not sure how or if they got fixed

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If mp3 files are used as sound effects, then libmad decoder can be a culprit. I don't know whether openbor uses libmad decoder.

libmad has been unmaintained for a long time.

mpg123 decoder is better maintained, and its pop noises are far quieter. It is quiet enough that I can't hear pops in most cases unless I wear headphones and focus.

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Sound effects are wav files.

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