SL_I3DL2_ENVIRONMENT_PRESET_DEFAULT

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
enum SL_I3DL2_ENVIRONMENT_PRESET_DEFAULT = SLEnvironmentalReverbSettings(SL_MILLIBEL_MIN, 0, 1000, 500, SL_MILLIBEL_MIN, 20, SL_MILLIBEL_MIN, 40, 1000, 1000);

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