diff --git a/lib/libmixer/mixer.3 b/lib/libmixer/mixer.3
--- a/lib/libmixer/mixer.3
+++ b/lib/libmixer/mixer.3
@@ -20,7 +20,7 @@
 .\" THE SOFTWARE.
 .\"
 
-.Dd January 19, 2023
+.Dd May 10, 2024
 .Dt MIXER 3
 .Os
 .Sh NAME
@@ -539,6 +539,22 @@
 
 (void)mixer_close(m);
 .Ed
+.Ss Loop through all mixer devices in the system
+.Bd -literal
+struct mixer *m;
+char buf[NAME_MAX];
+int n;
+
+if ((n = mixer_get_nmixers()) < 0)
+	errx(1, "no mixers present in the system");
+for (i = 0; i < n; i++) {
+	(void)snprintf(buf, sizeof(buf), "/dev/mixer%d", i);
+	if ((m = mixer_open(buf)) == NULL)
+		continue;
+	...
+	(void)mixer_close(m);
+}
+.Ed
 .Sh SEE ALSO
 .Xr queue 3 ,
 .Xr sysctl 3 ,