sound_effect sound_arg_repeats bug

[KVonGit]

When playing The Lurking Horror (r11) on MEGA65, it seems that entering the next command too quickly might set the repeats value on the wrong sound.

LURKSAV.D81.zip

If you restore the only save on that attached disk, then enter open hatch then turn on light then d, it will incorrectly loop the sound of opening the hatch (S-HATCH, which is sound 6).

When we go down from this location, it should play the sound of the rats (S-ATTACK, which is sound 4) on a loop until we enter OPEN VALVE to kill them, but, when the bug is triggered, it loops S-HATCH until I open the valve, at which point it starts S-ATTACK on a loop until the next sound is played, which is quite a few turns away (when the elevator crashes in my case, the way I play through the game).

Also, I actually entered those three commands separately the first time this happened (OPEN HATCH, TURN ON LIGHT, D), and it seems to just depend on whether we enter DOWN before S-HATCH has finished playing. If we wait for S-HATCH to finish, then go down, there is no issue with the sounds in this section.

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Note that I do not have an actual MEGA65. I am using the xemu XMEGA65. Not sure this matters, but it seems worth noting.

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Also note that Ozmoo is awesome.

[johanberntsson]

Thanks for testing and reporting. I tried using the real hardware but couldn't reproduce the problem from your save file. I'll update my emulator and try playing the game until the same save point and see if that works better.

[KVonGit]

I promise I didn't start off trying to test anything. =) I was really just in it for the guilty pleasure that is The Lurking Horror, ha-ha. Once I noticed the two bugs, I figured testing things a little more and reporting things would be the least I could do, especially since you and Fredrik contribute so much to the community. (I have learned tons from you two, directly and indirectly, and it is very much appreciated!)

Anyway, this might save you some time:

lurking_frob.zip

Tiny test game, includes PunyInform source, two LH sounds, the z3 file, and the D81; using sounds 4 and 6 from The Lurking Horror (converted to WAV for Ozmoo), as well as its release and serial numbers to make sound 4 a looping sound.

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Push the green button to play S-HATCH (sound 6), which should play once.

Push blue to play S-ATTACK (sound 4), which should loop.

The red button will stop both sounds, 4 and 6.

If you push green, then quickly push blue before S-HATCH is finished, it will make S-HATCH loop.

When using the Xemu MEGA65 emulator on either Windows 11, Linux Mint, or Arch Linux, I can reproduce the issue every time in the real game and this test game.

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If this does not happen using real hardware, I would think this is not an Ozmoo issue at all, and the issue is that the emulator is maybe running too fast (or something like that; I am a novice and have everything in the emulator at the defaults, except I switched it from PAL to NTSC video display).

[johanberntsson]

It's great that you test the games and the audio functionality. I've now been able to reproduce the problem so it shouldn't be to hard to fix it. Thanks for the test program. It makes debugging faster and easier.