// Calm-corner tone generator: a soft 432 Hz sine plus gentle harmonics with a
// slow "breathing" amplitude envelope, synthesised in real time and played
// through the BSP codec. Used by the Coin calme screen.
#pragma once

#include "esp_err.h"
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

esp_err_t lisael_calm_tone_start(void);
void      lisael_calm_tone_stop(void);
bool      lisael_calm_tone_is_playing(void);

#ifdef __cplusplus
}
#endif