When installing vibble it comes with two pre-installed packs. You can activate more packs in the app’s Packs section. Some of them are free, and some are available for purchase. (Since the packs are activated though App Store, you will be asked to verify the purchase, even for the free packs) You can preview the packs before activating, simply by pressing the name of a sound effect.
Your activated packs will appear in the «mix mode» window, and you can toggle between them by pressing the arrows to the left and right of the sample icons.
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