diff -urN midi_prog-/ch.c midi_prog/ch.c
--- midi_prog-/ch.c	2015-06-03 00:00:00.000000000 +0900
+++ midi_prog/ch.c	2015-06-09 00:00:00.000000000 +0900
@@ -5,8 +5,8 @@
 void
 ch_init(int ac, char **av)
 {
-	int i;
-	char *s, s_ch[8], buf[1024];
+	int i, ch;
+	char *s;
 	double v;
 
 	for(i=0; i<MIDI_CH_N; i++){
@@ -20,17 +20,10 @@
 		ch_inf[i].adj_vol = 1.0;
 	}
 
-	if((s = opt_str("-vol", ac, av, NULL)) != NULL){
-		while(*s && sscanf(s, "%[^:]:%s", s_ch, buf) == 2){
-			v = strtod(buf, &s);
-			if(strcmp(s_ch, "all") == 0){
-				for(i=0; i<MIDI_CH_N; i++) ch_inf[i].adj_vol = v;
-			}else{
-				int ch = strtol(s_ch, NULL, 0);
-				if(0 <= ch && ch < MIDI_CH_N) ch_inf[ch].adj_vol = v;
-			}
-			if(*s == ',') s++;
-		}
+	s = opt_str("-vol", ac, av, NULL);
+	while(opt_ch_loop_get_dbl(&s, &ch, &v)){
+		if(ch == -1) for(i=0; i<MIDI_CH_N; i++) ch_inf[i].adj_vol = v;
+		else if(0 <= ch && ch < MIDI_CH_N) ch_inf[ch].adj_vol = v;
 	}
 }
 
diff -urN midi_prog-/midtxt.c midi_prog/midtxt.c
--- midi_prog-/midtxt.c	2015-06-05 00:00:00.000000000 +0900
+++ midi_prog/midtxt.c	2015-06-09 00:00:00.000000000 +0900
@@ -1,6 +1,7 @@
 #include "util.h"
 #include "rd.h"
 #include "wrt.h"
+#include "ch.h"
 
 struct tbl{
 	int v;
@@ -223,7 +224,7 @@
 int
 tx_abs_conv(void)
 {
-	char buf[1024], tmp[1024];
+	char buf[BUFSZ], tmp[BUFSZ];
 	int abs = 0, delta;
 
 	while(fgets(buf, sizeof(buf), stdin)){
@@ -240,7 +241,7 @@
 int
 tx_delta_conv(void)
 {
-	char buf[1024], tmp[1024];
+	char buf[BUFSZ], tmp[BUFSZ];
 	int abs_prev = 0, abs;
 
 	while(fgets(buf, sizeof(buf), stdin)){
@@ -255,15 +256,195 @@
 }
 
 int
+len_get_hl(char *buf, int div4)
+{
+	int h, l = 1;
+	int ret = sscanf(buf, "%d/%d", &h, &l);
+	if(ret == 0) ERR("format");
+	return div4 * 4 * h / l;
+}
+
+void
+len_get(char *len_buf, int div4, int *len, int *len_on)
+{
+	*len = *len_on = len_get_hl(len_buf, div4);
+	if((len_buf = strchr(len_buf, '(')) == NULL) return;
+	*len_on = len_get_hl(len_buf+1, div4);
+}
+
+int
+str_to_note(char *note_buf)
+{
+	struct{
+		char *s;
+		int note;
+	}fix_tbl[] = {
+		{ "R", -1 },
+		{ "BD_Ac", 35 },
+		{ "BD1", 36 },
+		{ "SideStick", 37 },
+		{ "SD_Ac", 38 },
+		{ "HandClup", 39 },
+		{ "SD_El", 40 },
+		{ "LowFloorTom", 41 },
+		{ "HC", 42 },
+		{ "HighFloorTom", 43 },
+		{ "HP", 44 },
+		{ "LowTom", 45 },
+		{ "HO", 46 },
+		{ "LowMidTom", 47 },
+		{ "HiMidTom", 48 },
+		{ "CrashCym1", 49 },
+		{ "HighTom", 50 },
+		{ "RideCym1", 51 },
+		{ "CHineseCym1", 52 },
+		{ "RideBell", 53 },
+		{ "Tambourine", 54 },
+		{ "SplashCym", 55 },
+		{ "Cowbell", 56 },
+		{ "CrashCym2", 57 },
+		{ "Vibraslap", 58 },
+		{ "RideCym2", 59 },
+		{ "HiBongo", 60 },
+		{ "LowBongo", 61 },
+		{ "MuteHiConga", 62 },
+		{ "OpenHiConga", 63 },
+		{ "LowConga", 64 },
+		{ "HighTimbale", 65 },
+		{ "LowTimbale", 66 },
+		{ "HighAgogo", 67 },
+		{ "LowAgogo", 68 },
+		{ "Cabasa", 69 },
+		{ "Maracas", 70 },
+		{ "ShortWhistle", 71 },
+		{ "LongWhistle", 72 },
+		{ "ShortGuiro", 73 },
+		{ "LongGuiro", 74 },
+		{ "Claves", 75 },
+		{ "HiWoodBlock", 76 },
+		{ "LowWoodBlock", 77 },
+		{ "MuteCuica", 78 },
+		{ "OpenCuica", 79 },
+		{ "MuteTriangle", 80 },
+		{ "OpenTriangle", 81 },
+		{ NULL, -1 }
+	};
+
+	char *tbl[] = { "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B", NULL };
+	char buf[4], *sp = note_buf, *dp = buf;
+	int i;
+
+	for(i=0; fix_tbl[i].s; i++) if(strcmp(note_buf, fix_tbl[i].s) == 0) return fix_tbl[i].note;
+
+	*dp++ = *sp++;
+	if(*sp == '#') *dp++ = *sp++;
+	*dp = '\0';
+
+	for(i=0; tbl[i]; i++) if(strcmp(buf, tbl[i]) == 0) break;
+	if(tbl[i] == NULL) ERR("format");
+	return strtol(sp, NULL, 0) * 12 + i;
+}
+
+char *
+np_update(char *np)
+{
+	np = strchr(np, ',');
+	if(np && *np == ',') np++;
+	return np;
+}
+
+int
+len_to_delta_conv(int ac, char **av)
+{
+	int div4 = opt_int("-div4", ac, av, 96);
+	char buf[BUFSZ], len_buf[BUFSZ], notes_buf[BUFSZ], opt_buf[BUFSZ], sla[8], *np, note_buf[BUFSZ];
+	int len, len_on, ch, note, velo, delta;
+
+	while(fgets(buf, sizeof(buf), stdin)){
+		if(buf[0] == '#' || buf[0] == ';' || buf[0] == '\n' || buf[0] == '\0') continue;
+
+		velo=100;
+		strcpy(opt_buf, "");
+		if(sscanf(buf, "len=%s ch=%d note=%s %s", len_buf, &ch, notes_buf, opt_buf) <= 0){
+			fputs(buf, stdout);
+			continue;
+		}
+		strcpy(sla, "");
+		if(sscanf(opt_buf, "velo=%d %s", &velo, sla) == 0){
+			sscanf(opt_buf, "%s", sla);
+		}
+
+		len_get(len_buf, div4, &len, &len_on);
+
+		if(strcmp(sla, "-") != 0 && strcmp(sla, ">") != 0){
+			for(np=notes_buf; np && sscanf(np, "%[^,]", note_buf) == 1; np=np_update(np)){
+				if((note = str_to_note(note_buf)) < 0){
+					printf("delta=0 cmd=f8\n");
+				}else{
+					printf("delta=0 on ch=%d note=%d velo=%d\n", ch, note, velo);
+				}
+			}
+		}else{
+			printf("delta=0 cmd=f8\n");
+		}
+
+		if(strcmp(sla, "-") != 0 && strcmp(sla, "<") != 0){
+			delta = len_on;
+			for(np=notes_buf; np && sscanf(np, "%[^,]", note_buf) == 1; np=np_update(np)){
+				if((note = str_to_note(note_buf)) < 0){
+					printf("delta=%d cmd=f8\n", delta);
+				}else{
+					printf("delta=%d off ch=%d note=%d velo=%d\n", delta, ch, note, velo);
+				}
+				delta = 0;
+			}
+			if((delta = len - len_on) > 0){
+				printf("delta=%d cmd=f8\n", delta);
+			}
+		}else{
+			printf("delta=%d cmd=f8\n", len);
+		}
+	}
+	return 0;
+}
+
+int
+trans_conv(int ac, char **av, int trans)
+{
+	int en[ MIDI_CH_N ] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1 };
+	char *s = opt_str("-tx_trans_enable", ac, av, NULL);
+	char buf[BUFSZ], buf_time[BUFSZ], buf_cmd[BUFSZ], buf_velo[BUFSZ];
+	int i, v, ch, note;
+
+	while(opt_ch_loop_get(&s, &ch, &v)){
+		if(ch == -1) for(i=0; i<MIDI_CH_N; i++) en[i] = v;
+		else if(0 <= ch && ch < MIDI_CH_N) en[ch] = v;
+	}
+	while(fgets(buf, sizeof(buf), stdin)){
+		if(sscanf(buf, "%s %s ch=%d note=%d %s",
+			  buf_time, buf_cmd, &ch, &note, buf_velo) != 5 ||
+		   !en[ch]){
+			fputs(buf, stdout);
+			continue;
+		}
+		printf("%s %s ch=%d note=%d %s\n",
+		       buf_time, buf_cmd, ch, note + trans, buf_velo);
+	}
+	return 0;
+}
+
+int
 main(int ac, char **av)
 {
 	char buf_cmd[16], buf_type[16], buf_meta[16], buf[256];
 	char *cmd, *type_str, *meta;
-	int v, hi, low, same, ch, note, velo, type, n, i;
+	int v, hi, low, same, ch, note, velo, type, n, i, trans;
 
 	if(opt_idx("-r", ac, av) >= 0) return rconv();
 	if(opt_idx("-tx_abs", ac, av) >= 0) return tx_abs_conv();
 	if(opt_idx("-tx_delta", ac, av) >= 0) return tx_delta_conv();
+	if(opt_idx("-len", ac, av) >= 0) return len_to_delta_conv(ac, av);
+	if((trans = opt_int("-tx_trans", ac, av, 0)) != 0) return trans_conv(ac, av, trans);
 
 	rd_str(4, buf);
 	printf("%s\n", buf);
diff -urN midi_prog-/out.c midi_prog/out.c
--- midi_prog-/out.c	2015-04-29 00:00:00.000000000 +0900
+++ midi_prog/out.c	2015-06-09 00:00:00.000000000 +0900
@@ -23,7 +23,7 @@
 void
 out_init(struct out_rec *ot, int ac, char **av)
 {
-	char cmd[1024], *fn;
+	char cmd[BUFSZ], *fn;
 
 	ot->smp_freq = opt_int("-r", ac, av, 44100);
 	ot->smp_cnt = 0;
diff -urN midi_prog-/util.c midi_prog/util.c
--- midi_prog-/util.c	2015-04-20 00:00:00.000000000 +0900
+++ midi_prog/util.c	2015-06-09 00:00:00.000000000 +0900
@@ -37,6 +37,28 @@
 	return strtod(s, NULL);
 }
 
+int
+opt_ch_loop_get(char **sp, int *ch, int *v)
+{
+	double d;
+	int ret = opt_ch_loop_get_dbl(sp, ch, &d);
+	if(ret) *v = (int)d;
+	return ret;
+}
+
+int
+opt_ch_loop_get_dbl(char **sp, int *ch, double *v)
+{
+	char s_ch[8], buf[BUFSZ];
+	int ret = *sp && **sp && sscanf(*sp, "%[^:]:%s", s_ch, buf) == 2;
+	if(ret){
+		*v = strtod(buf, sp);
+		*ch = strcmp(s_ch, "all") == 0 ? -1 : strtol(s_ch, NULL, 0);
+		if(**sp == ',') (*sp)++;
+	}
+	return ret;
+}
+
 struct stklst *
 stklst_alloc(int size, struct stklst *prev)
 {
diff -urN midi_prog-/util.h midi_prog/util.h
--- midi_prog-/util.h	2015-04-20 00:00:00.000000000 +0900
+++ midi_prog/util.h	2015-06-09 00:00:00.000000000 +0900
@@ -11,6 +11,7 @@
 
 #define OFF		0
 #define ON		1
+#define BUFSZ		1024
 
 #define MIX(a, b, rate)		( (a) * (1 - (rate)) + (b) * (rate) )
 
@@ -19,6 +20,9 @@
 int opt_int(char *key, int ac, char **av, int def);
 double opt_double(char *key, int ac, char **av, double def);
 
+int opt_ch_loop_get(char **sp, int *ch, int *v);
+int opt_ch_loop_get_dbl(char **sp, int *ch, double *v);
+
 
 struct stklst{
 	int size;
diff -urN midi_prog-/voco.c midi_prog/voco.c
--- midi_prog-/voco.c	2015-04-29 00:00:00.000000000 +0900
+++ midi_prog/voco.c	2015-06-09 00:00:00.000000000 +0900
@@ -31,22 +31,15 @@
 adj_vol_init(int ac, char **av)
 {
 	double *adj_vol, v;
-	char *s, s_idx[8], buf[1024];
+	char *s;
 	int i;
 
 	if((adj_vol = malloc(sizeof(*adj_vol) * band.n)) == NULL) ERR("No Mem");
 	for(i=0; i<band.n; i++) adj_vol[i] = 1;
-	if((s = opt_str("-vol", ac, av, NULL)) != NULL){
-		while(*s && sscanf(s, "%[^:]:%s", s_idx, buf) == 2){
-			v = strtod(buf, &s);
-			if(strcmp(s_idx, "all") == 0){
-				for(i=0; i<band.n; i++) adj_vol[i] = v;
-			}else{
-				i = strtol(s_idx, NULL, 0);
-				if(0 <= i && i < band.n) adj_vol[i] = v;
-			}
-			if(*s == ',') s++;
-		}
+	s = opt_str("-vol", ac, av, NULL);
+	while(opt_ch_loop_get_dbl(&s, &i, &v)){
+		if(i == -1) for(i=0; i<band.n; i++) adj_vol[i] = v;
+		else if(0 <= i && i < band.n) adj_vol[i] = v;
 	}
 	return adj_vol;
 }