Re: C program for playing sound

I've used snd_pcm_prepare() because underrun (-EPIPE) was occurring 
because I had put the wrong value for frames, but despite adjusting the 
value of the frames, I am still getting the scratchy effect, here is the 
current code I have, now I am really stuck. Also yeah, "scratchy" would 
be a better description of the effect I suppose.

I might post a recording of the result later, meanwhile here is the code 
for now, I have removed snd_pcm_prepare() from it.

#include <stdlib.h>
#include <stdint.h>
#include <alsa/asoundlib.h>

#define STEREO 2
#define BITS 16 / 8
#define FRAMEBUFFERSIZE 512 // in samples
#define PERIODS 2
#define SAMPLERATE 11025

int main(void)
{
     snd_pcm_t *handle;
     uint32_t channels = STEREO;
     uint32_t sample_size = BITS; // 16 bit
     uint32_t frame_size = sample_size * channels;
     snd_pcm_uframes_t frames = FRAMEBUFFERSIZE / frame_size;
     snd_pcm_uframes_t frames_per_period = frames / PERIODS;
     int32_t dir = 0; // No idea what this does.
     snd_pcm_hw_params_t *params;
     int16_t framebuffer[FRAMEBUFFERSIZE * STEREO * BITS] = {0};
     FILE *wav;
     int32_t size;

     snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0);
     snd_pcm_hw_params_alloca(&params);
     snd_pcm_hw_params_any(handle, params);
     snd_pcm_hw_params_set_buffer_size(handle, params, frames);
     snd_pcm_hw_params_set_period_size(handle, params, 
frames_per_period, dir);
     snd_pcm_hw_params_set_rate(handle, params, SAMPLERATE, dir);
     snd_pcm_hw_params_set_access(handle, params, 
SND_PCM_ACCESS_RW_INTERLEAVED);
     snd_pcm_hw_params_set_channels(handle, params, STEREO);
     snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
     snd_pcm_hw_params(handle, params);

     // Insert samples to framebuffer.
     wav = fopen("pcm1611s.wav", "r");
     fseek(wav, 0L, SEEK_END);
     size = ftell(wav);
     fseek(wav, 0L, SEEK_SET);
     size /= sizeof(int16_t);
     while (size > 0)
     {
         fread(framebuffer, sizeof(int16_t), FRAMEBUFFERSIZE * STEREO * 
BITS, wav);
         snd_pcm_writei(handle, framebuffer, frames);
         size -= FRAMEBUFFERSIZE * BITS * STEREO;
     }
     snd_pcm_drain(handle);
     snd_pcm_close(handle);
     exit(EXIT_SUCCESS);
}