Specify the default ALSA audio playback device name.
Defined in <SDL3/SDL_hints.h>
#define SDL_HINT_AUDIO_ALSA_DEFAULT_PLAYBACK_DEVICE "SDL_AUDIO_ALSA_DEFAULT_PLAYBACK_DEVICE"
This variable is a specific audio device to open for playback, when the "default" audio device is used.
If this hint isn't set, SDL will check SDL_HINT_AUDIO_ALSA_DEFAULT_DEVICE before choosing a reasonable default.
This hint should be set before an audio device is opened.
This hint is available since SDL 3.1.7.