--- he.c.orig	2003-09-09 21:27:20.000000000 +0900
+++ he.c	2003-09-12 16:00:27.000000000 +0900
@@ -10,12 +10,14 @@
  * ESC キー：リセット
 */
 
+#define MULTIPLY_MAX 20
 typedef struct {
   SDL_AudioSpec spec;
   Uint8 *buffer;
-  Uint32 length;
+  Uint32 length[MULTIPLY_MAX];
   Uint32 length_backup;
-  Uint8 *position;
+  Uint8 *position[MULTIPLY_MAX];
+  int playing[MULTIPLY_MAX];
 } audio_t;
 
 SDL_Surface *he_push= NULL, *he_normal= NULL, *he_num= NULL;
@@ -33,17 +35,21 @@
 /* サウンドデータの読み込み */
 audio_t LoadAudio(const char *filename) {
   audio_t a;
-
+  int i;
   if(SDL_LoadWAV("he.wav", 
-		 &a.spec, &a.buffer, &a.length)== NULL) {
+		 &a.spec, &a.buffer, &a.length[0])== NULL) {
     fprintf(stderr, 
 	    "Could not open test.wav: %s\n", 
 	    SDL_GetError());
     exit(-1);
   }
-  a.position= a.buffer;
-  a.length_backup= a.length;
 
+  a.length_backup= a.length[0];
+  for(i = 0; i < MULTIPLY_MAX; i++){
+    a.position[i]= a.buffer;
+    a.playing[i] = 0;
+    if(i > 0) a.length[i] = a.length[0];
+  }
   return a;
 }
 
@@ -54,27 +60,53 @@
 void audio_callback(void *userdata,
 		    Uint8 *stream,
 		    int len) {  
+  int i;
   audio_t *audio;
   audio= (audio_t*)userdata;
-  
   if(len== 0)
     return;
 
-  if(audio->length< len)
-    len= audio->length;
+  for(i = 0; i < MULTIPLY_MAX; i++){
+    if(audio->playing[i] == 0) continue;
+    if(audio->length[i]< len)
+      len= audio->length[i];
   
-  SDL_MixAudio(stream, audio->position, len, SDL_MIX_MAXVOLUME);
+    SDL_MixAudio(stream, audio->position[i], len, 80/*SDL_MIX_MAXVOLUME*/);
 
-  audio->position+= len;
-  audio->length-= len;
+    audio->position[i]+= len;
+    audio->length[i]-= len;
+    if(audio->length[i] <= 0) audio->playing[i] = 0;
+  }
+}
+int num_playing(audio_t *a)
+{
+  int result = 0; int i;
+  for(i = 0; i < MULTIPLY_MAX; i++){
+    if(a->playing[i] == 1){
+      result++;
+    }
+  }
+  return result;
 }
 void audioPlay(audio_t *a) {
-  SDL_PauseAudio(1);
-  SDL_LockAudio();
-  a->position= a->buffer;
-  a->length= a->length_backup;
-  SDL_UnlockAudio();
-  SDL_PauseAudio(0);
+  int i;
+  if(num_playing(a) > 0){
+    SDL_PauseAudio(1);
+    SDL_LockAudio();
+  }
+
+  for(i = 0; i < MULTIPLY_MAX; i++){
+    if(a->playing[i] == 0){
+      a->position[i]= a->buffer;
+      a->length[i]= a->length_backup;
+      a->playing[i] = 1;
+      break;
+    }
+  }
+  if(num_playing(a) > 0){
+    SDL_UnlockAudio();
+    SDL_PauseAudio(0);
+  }
 }
 
 void SetupAudioDevice(audio_t *audio) {