diff --git a/case-lib/lib.sh b/case-lib/lib.sh
index de53bc2c7..ae5c2c32e 100644
--- a/case-lib/lib.sh
+++ b/case-lib/lib.sh
@@ -264,3 +264,8 @@ sudo sync -f || true
 if [ ! "$DMESG_LOG_START_LINE" ]; then
     DMESG_LOG_START_LINE=$(wc -l /var/log/kern.log|awk '{print $1;}')
 fi
+
+is_sof_used()
+{
+    grep -E "sof" /proc/asound/cards;
+}