diff --git a/obsd-vol.sh b/obsd-vol.sh
new file mode 100755
index 0000000..f5577c7
--- /dev/null
+++ b/obsd-vol.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+INCR=${1:-10}
+OUTPUT=$(mixerctl -n outputs.master)
+CURRENT=${OUTPUT%,*}
+VOL=$(( $CURRENT + $INCR ))
+
+mixerctl outputs.master=$VOL,$VOL