diff --git a/src/sound.c b/src/sound.c
index 4ccd01b..578ddfd 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -93,6 +93,7 @@ static int16_t cd_buffer[CD_BUFLEN * 2];
 static thread_t *sound_cd_thread_h;
 static event_t *sound_cd_event;
 static unsigned int cd_vol_l, cd_vol_r;
+static int cd_buf_update = CD_BUFLEN / SOUNDBUFLEN;
 
 void sound_set_cd_volume(unsigned int vol_l, unsigned int vol_r)
 {
@@ -207,8 +208,13 @@ void sound_poll(void *priv)
         fwrite(buf16,(SOUNDBUFLEN)*2*2,1,soundf);*/
         
                 if (soundon) givealbuffer(outbuffer);
-        
-                thread_set_event(sound_cd_event);
+
+                cd_buf_update--;
+                if (!cd_buf_update)
+                {
+                        cd_buf_update = (48000 / SOUNDBUFLEN) / (CD_FREQ / CD_BUFLEN);
+                        thread_set_event(sound_cd_event);
+                }
 
                 sound_pos_global = 0;
         }
diff --git a/src/soundopenal.c b/src/soundopenal.c
index 58957e7..f87d1c2 100644
--- a/src/soundopenal.c
+++ b/src/soundopenal.c
@@ -91,7 +91,8 @@ void inital()
 #ifdef USE_OPENAL
         int c;
         int16_t buf[BUFLEN*2];
-
+        int16_t cd_buf[CD_BUFLEN*2];
+        
 //        printf("1\n");
         check();
 
@@ -120,12 +121,13 @@ void inital()
         check();
 
         memset(buf,0,BUFLEN*4);
+        memset(cd_buf, 0, CD_BUFLEN*4);
 
 //        printf("5\n");
         for (c = 0; c < 4; c++)
         {
                 alBufferData(buffers[c], AL_FORMAT_STEREO16, buf, BUFLEN*2*2, FREQ);
-                alBufferData(buffers_cd[c], AL_FORMAT_STEREO16, buf, CD_BUFLEN*2*2, CD_FREQ);
+                alBufferData(buffers_cd[c], AL_FORMAT_STEREO16, cd_buf, CD_BUFLEN*2*2, CD_FREQ);
         }
 
         alSourceQueueBuffers(source[0], 4, buffers);