Play ~aproximatively~ the melody when you open a chest in zelda games with the beeper of your pc. (you need to run it as root).

setup.sh

#!/bin/sh
gcc zelda_beep.c -o zelda_beep

# set the setuid bit to allow anyone to run this as root
sudo chown root:root zelda_beep
sudo chmod 4755 zelda_beep

./zelda_beep

zelda_beep.c

#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/kd.h>
#include <zconf.h>
#include <stdio.h>

#ifndef CLOCK_TICK_RATE
#define CLOCK_TICK_RATE 1193180.0
#endif

#define N_HIGH_G 1567.98
#define N_HIGH_FS 1479.98
#define N_HIGH_DS 1244.51
#define N_MIDDLE_A 440.0
#define N_MIDDLE_GS 415.30
#define N_HIGH_E 1318.51
#define N_HIGH_GS 1661.22
#define N_HIGH_C 1046.50

int play_beep(int fd, int millis, float freq) {
    if (ioctl(fd, KIOCSOUND, (int) (CLOCK_TICK_RATE / freq)) < 0) {
        perror("Failed to beep");
        return 1;
    }

    printf("Playing freq %f\n", freq);

    usleep((__useconds_t) (1000 * millis));
    ioctl(fd, KIOCSOUND, 0);
    return 0;
}

int main() {
    int console_fd = open("/dev/console", O_WRONLY);
    if (console_fd == -1) {
        perror("Failed to open /dev/console");
        return 1;
    }

    play_beep(console_fd, 130, N_HIGH_G);
    play_beep(console_fd, 130, N_HIGH_FS);
    play_beep(console_fd, 130, N_HIGH_DS);
    play_beep(console_fd, 130, N_MIDDLE_A);
    play_beep(console_fd, 130, N_MIDDLE_GS);
    play_beep(console_fd, 130, N_HIGH_E);
    play_beep(console_fd, 130, N_HIGH_GS);
    play_beep(console_fd, 800, N_HIGH_C);

    close(console_fd);
    return 0;
}