diff -urN midi_prog-/txprm.c midi_prog/txprm.c
--- midi_prog-/txprm.c	Fri Apr  3 00:00:00 2015
+++ midi_prog/txprm.c	Fri Apr  3 02:00:00 2015
@@ -38,6 +38,33 @@
 	}
 }
 
+void
+rev_cnv(char *type, char *name, char *val)
+{
+	if(strcmp(type, "int") == 0){
+		int v = atoi(val);
+		fwrite(&v, sizeof(v), 1, stdout);
+	}else if(strcmp(type, "double") == 0){
+		double v = atof(val);
+		fwrite(&v, sizeof(v), 1, stdout);
+	}else if(strcmp(type, "addr") == 0){
+		void *v = NULL;
+		sscanf(val, "%p", &v);
+		fwrite(&v, sizeof(v), 1, stdout);
+	}else if(strcmp(type, "str") == 0){
+		char *p;
+		int n;
+		if(val[0] == '"') val = val +1;
+		if((p = strrchr(val, '"')) != NULL) *p = '\0';
+		n = strlen(val) + 1;
+		fwrite(val, n, 1, stdout);
+	}else{
+		MSG(type);
+		MSG(name);
+		ERR("rev_cnv");
+	}
+}
+
 char *
 loop(char *fmt, int idt, int n)
 {
@@ -73,15 +100,34 @@
 	return fmt;
 }
 
+void
+rev_work(void)
+{
+	char buf[ 4096 ], type[32], name[32], val[4096];
+	int i;
+
+	while(fgets(buf, sizeof(buf), stdin) != NULL){
+		for(i=0; buf[i]==' '; i++);
+		sscanf(buf+i, "%s %s %[^\n]\n", type, name, val);
+		rev_cnv(type, name, val);
+	}
+}
+
 int
 main(int ac, char **av)
 {
 	char *fn = opt_str("-f", ac, av, "prmfmt.txt");
-	int fd_fmt = open(fn, O_RDONLY);
+	int fd_fmt;
 	struct stat sb;
 	size_t len;
 	char *fmt;
 
+	if(opt_idx("-r", ac, av) >= 0){
+		rev_work();
+		return 0;
+	}
+
+	fd_fmt = open(fn, O_RDONLY);
 	if(fd_fmt == -1){
 		MSG(fn);
 		ERR("open");