Random sounds for sound sample button

[Imperf3kt]

This is likely a very easy function that's probably been covered somewhere, but I didn't see anything while searching the forum, and figured some novices would potentially find this useful.

By default, Ren'Py comes with a volume test button in the preferences screen. You can set a sound to play by making sure sounds are enabled and defining the music file to play within Options.rpy

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define config.has_sound = True
define config.sample_sound = "music/effects/gun1.wav"

Then, within the Screens.rpy, within the preferences menu, you'll find:

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if config.has_sound:
                        label _("Sound Volume")

                        hbox:
                            bar value Preference("sound volume")

                            if config.sample_sound:
                                textbutton _("Test") action Play("sound", config.sample_sound)

So, let's assume we want multiple sounds at play at random.
For that, we can use Ren'Py random.

Directly underneath the start of the screen, add the following:

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screen preferences():
    $ sfx_test = renpy.random.randint(1, 3)# range of samples to use. For more or less samples, change the 3 to suit.

This example tells Ren'Py to choose between one of three possible choices.
So now you need to define what those choices are.
Go back to Options.rpy and replace this line define config.sample_sound = "music/effects/gun1.wav" with:

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define config.sample_sound = ["music/effects/gun1.wav", "music/effects/gun2.wav", "music/effects/glass1.wav"]

Remember to use your own file names/paths

Go to the Screens.rpy file again and change:

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                            if config.sample_sound:
                                textbutton _("Test") action Play("sound", config.sample_sound)

to

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                            if config.sample_sound:
                                if sfx_test == 1:
                                    textbutton _("Test") action [ Play("sound", "music/effects/gun1.wav") ]
                                if sfx_test == 2:
                                    textbutton _("Test") action [ Play("sound", "music/effects/gun2.wav") ]
                                if sfx_test == 3:
                                    textbutton _("Test") action [ Play("sound", "music/effects/glass1.wav") ]

And presto, whenever a player presses the test sound volume button, Ren'Py will choose one of the three (or more) available files to play.