failure to initialize SDL audio - c++

Question

When i Call SDL_Init passing in SDL_AUDIO_INIT, the function returns a failure.
I called SDL_GetError() but there does not seem to be any message.
I am not having problems getting VIDEO to initialize, only audio. I don't get any errors when compiling. I have linked the SDL mixer library in my makefile.
Here is a minimum reproducible example code:
#include <SDL2/SDL.h>
#include <stdio.h>
#include <string>
int main( int argc, char* args[] )
{
//Initialize SDL
if( SDL_Init( SDL_INIT_VIDEO < 0))
{
printf( "SDL VIDEO could not initialize! SDL Error: %s\n", SDL_GetError() );
}
else if ( SDL_Init( SDL_INIT_AUDIO) < 0)
{
printf( "SDL AUDIO could not initialize! SDL Error: %s\n", SDL_GetError() );
}
else
{
printf("video and audio initialized");
}
return 0;
}
output: SDL AUDIO could not initialize! SDL Error:
(there is no message for the error)
Here is the makefile
#OBJS specifies which files to compile as part of the project
OBJS = 21_sound_effects_and_music.cpp
#CC specifies which compiler we're using
CC = g++
#COMPILER_FLAGS specifies the additional compilation options we're using
# -w suppresses all warnings
COMPILER_FLAGS = -g -Wall
#LINKER_FLAGS specifies the libraries we're linking against
LINKER_FLAGS = -lSDL2 -lSDL2_image -lSDL2_ttf -lSDL2_mixer
#OBJ_NAME specifies the name of our exectuable
OBJ_NAME = sdl_program
#This is the target that compiles our executable
all : $(OBJS)
$(CC) $(OBJS) $(COMPILER_FLAGS) $(LINKER_FLAGS) -o $(OBJ_NAME)
I am using Ubuntu 20.04

Answer 1

install libasound2-dev libpulse-dev
and recompyling SDL2
Audio drivers : disk dummy oss alsa(dynamic) pulse(dynamic) <--- IS OK