Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK - A value used to request a default playback audio device.
SYNOPSIS
#include <SDL3/SDL_audio.h>
#define SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK ((SDL_AudioDeviceID) 0xFFFFFFFFu)
DESCRIPTION
Several functions that require an SDL_AudioDeviceID will accept this value to signify the app just wants
the system to choose a default device instead of the app providing a specific one.
AVAILABILITY
This macro is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK(3)