diff --git a/sys/dev/sound/pcm/channel.c b/sys/dev/sound/pcm/channel.c
--- a/sys/dev/sound/pcm/channel.c
+++ b/sys/dev/sound/pcm/channel.c
@@ -2115,6 +2115,9 @@
 	oldformat = c->format;
 	oldspeed = c->speed;
 
+	if (c->speed == speed)
+		return (0);
+
 	ret = chn_setparam(c, c->format, speed);
 	if (ret != 0) {
 		if (snd_verbose > 3)
@@ -2143,6 +2146,9 @@
 	oldformat = c->format;
 	oldspeed = c->speed;
 
+	if (c->format == format)
+		return (0);
+
 	ret = chn_setparam(c, format, c->speed);
 	if (ret != 0) {
 		if (snd_verbose > 3)