why is incorrect audio format? - c

Question

when i start the code i get warning: incorrect audio format
i figured out its related to the mp3 file.
whats the problem and how can i fix it?
i already tried to convert the mp3 to a wav file but that also didnt work.
is it possible that 3mb of mp3 is to big? shouldnt be?
Edit: when i let it run without of mp3 the wav files will run just fine
with mp3 the programm will start but no sound at all
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_mixer.h>
static const int width = 800;
static const int height = 600;
int main(int argc, char **argv)
{
// Initialize SDL video and audio systems
SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO);
// Initialize SDL mixer
Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 3, 2048);
// Load audio files
Mix_Music *backgroundSound = Mix_LoadMUS("portfolio.mp3");
Mix_Chunk *jumpEffect = Mix_LoadWAV("JumpEffect.wav");
Mix_Chunk *laserEffect = Mix_LoadWAV("LaserEffect.wav");
//Mix_Chunk *musicEffect = Mix_LoadWAV("portfolio2.wav");
// Create a SDL window
SDL_Window *window = SDL_CreateWindow("Hello, SDL2", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, SDL_WINDOW_OPENGL);
// Create a renderer (accelerated and in sync with the display refresh rate)
SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
// Start the background music
Mix_PlayMusic(backgroundSound, -1);
bool running = true;
SDL_Event event;
while(running)
{
// Process events
while(SDL_PollEvent(&event))
{
if(event.type == SDL_QUIT)
{
running = false;
}
else if(event.type == SDL_KEYDOWN)
{
// Press "1" and play jump effect
if(event.key.keysym.sym == SDLK_1)
{
Mix_PlayChannel(-1, jumpEffect, 0);
}
// Press "2" and play laser effect
else if(event.key.keysym.sym == SDLK_2)
{
Mix_PlayChannel(-1, laserEffect, 0);
}
}
}
// Clear screen
SDL_RenderClear(renderer);
// Draw
// Show what was drawn
SDL_RenderPresent(renderer);
}
// Release resources
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
Mix_FreeMusic(backgroundSound);
Mix_FreeChunk(jumpEffect);
Mix_FreeChunk(laserEffect);
//Mix_FreeChunk(music);
Mix_CloseAudio();
SDL_Quit();
return 0;
}