// Called from the mixer.
void audio_level_callback(float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float gain_staging_db, float final_makeup_gain_db, float correlation);
std::chrono::steady_clock::time_point last_audio_level_callback;
Ui::MainWindow *ui;
// Called from the mixer.
void audio_level_callback(float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float gain_staging_db, float final_makeup_gain_db, float correlation);
std::chrono::steady_clock::time_point last_audio_level_callback;
Ui::MainWindow *ui;