diff --git a/sound/firewire/fireface/ff-protocol-latter.c b/sound/firewire/fireface/ff-protocol-latter.c
index 64767ba439db..a812ab6feb58 100644
--- a/sound/firewire/fireface/ff-protocol-latter.c
+++ b/sound/firewire/fireface/ff-protocol-latter.c
@@ -264,7 +264,50 @@ static void latter_dump_status(struct snd_ff *ff, struct snd_info_buffer *buffer
 	snd_iprintf(buffer, "Referred clock: %s %d\n", label, rate);
 }
 
+// NOTE: transactions are transferred within 0x00-0x7f in allocated range of
+// address. This seems to be for check of discontinuity in receiver side.
+static void latter_handle_midi_msg(struct snd_ff *ff, unsigned int offset,
+				   __le32 *buf, size_t length)
+{
+	u32 data = le32_to_cpu(*buf);
+	unsigned int index = (data & 0x000000f0) >> 4;
+	u8 byte[3];
+	struct snd_rawmidi_substream *substream;
+	unsigned int len;
+
+	if (index > ff->spec->midi_in_ports)
+		return;
+
+	switch (data & 0x0000000f) {
+	case 0x00000008:
+	case 0x00000009:
+	case 0x0000000a:
+	case 0x0000000b:
+	case 0x0000000e:
+		len = 3;
+		break;
+	case 0x0000000c:
+	case 0x0000000d:
+		len = 2;
+		break;
+	default:
+		len = data & 0x00000003;
+		if (len == 0)
+			len = 3;
+		break;
+	}
+
+	byte[0] = (data & 0x0000ff00) >> 8;
+	byte[1] = (data & 0x00ff0000) >> 16;
+	byte[2] = (data & 0xff000000) >> 24;
+
+	substream = READ_ONCE(ff->tx_midi_substreams[index]);
+	if (substream)
+		snd_rawmidi_receive(substream, byte, len);
+}
+
 const struct snd_ff_protocol snd_ff_protocol_latter = {
+	.handle_midi_msg	= latter_handle_midi_msg,
 	.get_clock		= latter_get_clock,
 	.switch_fetching_mode	= latter_switch_fetching_mode,
 	.begin_session		= latter_begin_session,
diff --git a/sound/firewire/fireface/ff.c b/sound/firewire/fireface/ff.c
index c09a4875aa86..a2a9fd82f27d 100644
--- a/sound/firewire/fireface/ff.c
+++ b/sound/firewire/fireface/ff.c
@@ -32,8 +32,7 @@ static void ff_card_free(struct snd_card *card)
 	struct snd_ff *ff = card->private_data;
 
 	snd_ff_stream_destroy_duplex(ff);
-	if (ff->spec->midi_high_addr > 0)
-		snd_ff_transaction_unregister(ff);
+	snd_ff_transaction_unregister(ff);
 }
 
 static void do_registration(struct work_struct *work)
@@ -51,11 +50,9 @@ static void do_registration(struct work_struct *work)
 	ff->card->private_free = ff_card_free;
 	ff->card->private_data = ff;
 
-	if (ff->spec->midi_high_addr > 0) {
-		err = snd_ff_transaction_register(ff);
-		if (err < 0)
-			goto error;
-	}
+	err = snd_ff_transaction_register(ff);
+	if (err < 0)
+		goto error;
 
 	name_card(ff);
 
@@ -65,11 +62,9 @@ static void do_registration(struct work_struct *work)
 
 	snd_ff_proc_init(ff);
 
-	if (ff->spec->midi_in_ports > 0 || ff->spec->midi_out_ports > 0) {
-		err = snd_ff_create_midi_devices(ff);
-		if (err < 0)
-			goto error;
-	}
+	err = snd_ff_create_midi_devices(ff);
+	if (err < 0)
+		goto error;
 
 	err = snd_ff_create_pcm_devices(ff);
 	if (err < 0)
@@ -124,8 +119,7 @@ static void snd_ff_update(struct fw_unit *unit)
 	if (!ff->registered)
 		snd_fw_schedule_registration(unit, &ff->dwork);
 
-	if (ff->spec->midi_high_addr > 0)
-		snd_ff_transaction_reregister(ff);
+	snd_ff_transaction_reregister(ff);
 
 	if (ff->registered)
 		snd_ff_stream_update_duplex(ff);
@@ -177,7 +171,10 @@ static const struct snd_ff_spec spec_ucx = {
 	.name = "FirefaceUCX",
 	.pcm_capture_channels = {18, 14, 12},
 	.pcm_playback_channels = {18, 14, 12},
+	.midi_in_ports = 2,
 	.protocol = &snd_ff_protocol_latter,
+	.midi_high_addr = 0xffff00000034ull,
+	.midi_addr_range = 0x80,
 };
 
 static const struct ieee1394_device_id snd_ff_id_table[] = {