set_StopPreviousSound()

virtual void Aspose::Slides::Animation::IEffect::set_StopPreviousSound(bool value)=0

auto presentation = System::MakeObject<Presentation>(u"demo.pptx");

// Get the first effect of the first slide.
auto firstSlideEffect = presentation->get_Slides()->idx_get(0)->get_Timeline()->get_MainSequence()->idx_get(0);

// Get the first effect of the second slide.
auto secondSlideEffect = presentation->get_Slides()->idx_get(1)->get_Timeline()->get_MainSequence()->idx_get(0);

if (firstSlideEffect->get_Sound() != nullptr)
{
    // Change the second effect Enhancements/Sound to "Stop Previous Sound"
    secondSlideEffect->set_StopPreviousSound(true);
}