diff --git a/include/uapi/sound/asequencer.h b/include/uapi/sound/asequencer.h
index 2470eaa5edc52960f734b7749ea9ebc463578f8a..c4632bd9d3a0ebff6ae259fc61a4c9eca93da672 100644
--- a/include/uapi/sound/asequencer.h
+++ b/include/uapi/sound/asequencer.h
@@ -347,6 +347,7 @@ typedef int __bitwise snd_seq_client_type_t;
 #define SNDRV_SEQ_FILTER_BROADCAST	(1U<<0)	/* accept broadcast messages */
 #define SNDRV_SEQ_FILTER_MULTICAST	(1U<<1)	/* accept multicast messages */
 #define SNDRV_SEQ_FILTER_BOUNCE		(1U<<2)	/* accept bounce event in error */
+#define SNDRV_SEQ_FILTER_NO_CONVERT	(1U<<30) /* don't convert UMP events */
 #define SNDRV_SEQ_FILTER_USE_EVENT	(1U<<31)	/* use event filter */
 
 struct snd_seq_client_info {
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 07b090f76b5f9548d36a5d882f6d374e0b3cfd49..3b1adcb1ccdd46043d31a0afd4e78226b5969d6b 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -671,14 +671,16 @@ static int snd_seq_deliver_single_event(struct snd_seq_client *client,
 					  dest_port->time_real);
 
 #if IS_ENABLED(CONFIG_SND_SEQ_UMP)
-	if (snd_seq_ev_is_ump(event)) {
-		result = snd_seq_deliver_from_ump(client, dest, dest_port,
-						  event, atomic, hop);
-		goto __skip;
-	} else if (snd_seq_client_is_ump(dest)) {
-		result = snd_seq_deliver_to_ump(client, dest, dest_port,
-						event, atomic, hop);
-		goto __skip;
+	if (!(dest->filter & SNDRV_SEQ_FILTER_NO_CONVERT)) {
+		if (snd_seq_ev_is_ump(event)) {
+			result = snd_seq_deliver_from_ump(client, dest, dest_port,
+							  event, atomic, hop);
+			goto __skip;
+		} else if (snd_seq_client_is_ump(dest)) {
+			result = snd_seq_deliver_to_ump(client, dest, dest_port,
+							event, atomic, hop);
+			goto __skip;
+		}
 	}
 #endif /* CONFIG_SND_SEQ_UMP */
 
diff --git a/sound/core/seq/seq_dummy.c b/sound/core/seq/seq_dummy.c
index 2e8844ee32eddaf60b801aab2cf9cf072f3618b0..9308194b2d9adf75d99d8dd799f94e4b6fe2b99a 100644
--- a/sound/core/seq/seq_dummy.c
+++ b/sound/core/seq/seq_dummy.c
@@ -152,6 +152,7 @@ static int __init
 register_client(void)
 {
 	struct snd_seq_dummy_port *rec1, *rec2;
+	struct snd_seq_client *client;
 	int i;
 
 	if (ports < 1) {
@@ -165,6 +166,13 @@ register_client(void)
 	if (my_client < 0)
 		return my_client;
 
+	/* don't convert events but just pass-through */
+	client = snd_seq_kernel_client_get(my_client);
+	if (!client)
+		return -EINVAL;
+	client->filter = SNDRV_SEQ_FILTER_NO_CONVERT;
+	snd_seq_kernel_client_put(client);
+
 	/* create ports */
 	for (i = 0; i < ports; i++) {
 		rec1 = create_port(i, 0);