diff --git a/aucat/aucat.c b/aucat/aucat.c
index ca59a95..0df6f39 100644
--- a/aucat/aucat.c
+++ b/aucat/aucat.c
@@ -429,17 +429,15 @@ main(int argc, char **argv)
 	else
 		prog++;
 	if (strcmp(prog, PROG_AUCAT) == 0) {
-		optstr = "a:b:c:C:de:f:h:i:j:lL:m:Mno:q:r:s:t:U:v:w:x:z:";
+		optstr = "b:c:C:de:f:h:i:j:m:no:q:r:t:v:w:x:z:";
 		usagestr = aucat_usage;
 	} else if (strcmp(prog, PROG_SNDIOD) == 0) {
 		optstr = "a:b:c:C:de:f:j:L:m:Mq:r:s:t:U:v:w:x:z:";
 		usagestr = sndiod_usage;
 		background = 1;
 		hold = 0;
-	} else {
-		fprintf(stderr, "%s: can't determine program to run\n", prog);
-		return 1;
-	}
+	} else
+		errx(1, "%s: can't determine program to run", prog);
 
 	while ((c = getopt(argc, argv, optstr)) != -1) {
 		switch (c) {
@@ -553,9 +551,6 @@ main(int argc, char **argv)
 		case 'M':
 			mkdev("midithru", MODE_THRU, 0, 0, hold, 0);
 			break;
-		case 'l':
-			background = 1;
-			break;
 		default:
 			fputs(usagestr, stderr);
 			exit(1);
diff --git a/aucat/dev.c b/aucat/dev.c
index f15f305..5e2ffd7 100644
--- a/aucat/dev.c
+++ b/aucat/dev.c
@@ -373,7 +373,12 @@ dev_open(struct dev *d)
 		d->ipar = par;
 		d->opar = par;
 		d->rate = rate;
-		d->round = rate;
+		/* 
+		 * block sizes in the resampling code are limited to
+		 * 2^15, so use 1/15 of the rate, since all standard
+		 * sample rates are multiple of 15
+		 */
+		d->round = rate / 15;
 		d->bufsz = 2 * d->round;
 	}
 #ifdef DEBUG
diff --git a/aucat/listen.c b/aucat/listen.c
index e0ef304..b016541 100644
--- a/aucat/listen.c
+++ b/aucat/listen.c
@@ -62,10 +62,8 @@ listen_new_un(char *path)
 	struct listen *f;
 
 	sock = socket(AF_UNIX, SOCK_STREAM, 0);
-	if (sock < 0) {
-		perror("socket");
-		exit(1);
-	}
+	if (sock < 0)
+		err(1, "socket");
 	if (unlink(path) < 0 && errno != ENOENT) {
 		perror("unlink");
 		goto bad_close;
@@ -83,10 +81,8 @@ listen_new_un(char *path)
 	if (f == NULL)
 		goto bad_close;
 	f->path = strdup(path);
-	if (f->path == NULL) {
-		perror("strdup");
-		exit(1);
-	}
+	if (f->path == NULL)
+		err(1, "strdup");
 	f->fd = sock;
 	f->next = listen_list;
 	listen_list = f;
@@ -114,10 +110,8 @@ listen_new_tcp(char *addr, unsigned int port)
 	aihints.ai_socktype = SOCK_STREAM;
 	aihints.ai_protocol = IPPROTO_TCP;
 	error = getaddrinfo(host, serv, &aihints, &ailist);
-	if (error) {
-		fprintf(stderr, "%s: %s\n", addr, gai_strerror(error));
-		exit(1);
-	}
+	if (error)
+		errx(1, "%s: %s", addr, gai_strerror(error));
 
 	/* 
 	 * for each address, try create a listening socket bound on
diff --git a/aucat/opt.c b/aucat/opt.c
index 74840e6..0145626 100644
--- a/aucat/opt.c
+++ b/aucat/opt.c
@@ -14,6 +14,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -37,22 +38,16 @@ opt_new(char *name, struct dev *dev,
 	char c;
 
 	for (len = 0; name[len] != '\0'; len++) {
-		if (len == OPT_NAMEMAX) {
-			fprintf(stderr, "%s: name too long\n", name);
-			exit(1);
-		}
+		if (len == OPT_NAMEMAX)
+		    errx(1, "%s: name too long", name);
 		c = name[len];
 		if ((c < 'a' || c > 'z') &&
-		    (c < 'A' || c > 'Z')) {
-			fprintf(stderr, "%s: '%c' not allowed\n", name, c);
-			exit(1);
-		}
+		    (c < 'A' || c > 'Z'))
+			errx(1, "%s: '%c' not allowed", name, c);
 	}
 	o = malloc(sizeof(struct opt));
-	if (o == NULL) {
-		perror("opt_new: malloc");
-		exit(1);
-	}
+	if (o == NULL)
+		err(1, "opt_new: malloc");
 	if (mode & MODE_RECMASK)
 		o->wpar = (mode & MODE_MON) ? *rpar : *wpar;
 	if (mode & MODE_PLAY)
@@ -65,10 +60,8 @@ opt_new(char *name, struct dev *dev,
 	memcpy(o->name, name, len + 1);
 	for (po = &opt_list; *po != NULL; po = &(*po)->next) {
 		if (o->dev->num == (*po)->dev->num &&
-		    strcmp(o->name, (*po)->name) == 0) {
-			fprintf(stderr, "%s: already defined\n", o->name);
-			exit(1);
-		}
+		    strcmp(o->name, (*po)->name) == 0)
+			errx(1, "%s: already defined", o->name);
 	}
 	o->next = NULL;
 	*po = o;