diff --git a/spa/plugins/audioconvert/audioconvert.c b/spa/plugins/audioconvert/audioconvert.c
index 1b5cbd062..47c709c69 100644
--- a/spa/plugins/audioconvert/audioconvert.c
+++ b/spa/plugins/audioconvert/audioconvert.c
@@ -28,6 +28,7 @@
 #include <spa/pod/filter.h>
 #include <spa/pod/dynamic.h>
 #include <spa/debug/types.h>
+#include <spa/control/ump-utils.h>
 
 #include "volume-ops.h"
 #include "fmt-ops.h"
@@ -302,7 +303,7 @@ static void emit_port_info(struct impl *this, struct port *port, bool full)
 				items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_IGNORE_LATENCY, "true");
 		} else if (PORT_IS_CONTROL(this, port->direction, port->id)) {
 			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_NAME, "control");
-			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "8 bit raw midi");
+			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "32 bit raw UMP");
 		}
 		if (this->group_name[0] != '\0')
 			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_GROUP, this->group_name);
@@ -1259,17 +1260,19 @@ static int apply_props(struct impl *this, const struct spa_pod *param)
 
 static int apply_midi(struct impl *this, const struct spa_pod *value)
 {
-	const uint8_t *val = SPA_POD_BODY(value);
-	uint32_t size = SPA_POD_BODY_SIZE(value);
 	struct props *p = &this->props;
+	uint8_t data[8];
+	int size;
 
+	size = spa_ump_to_midi(SPA_POD_BODY(value), SPA_POD_BODY_SIZE(value),
+			data, sizeof(data));
 	if (size < 3)
 		return -EINVAL;
 
-	if ((val[0] & 0xf0) != 0xb0 || val[1] != 7)
+	if ((data[0] & 0xf0) != 0xb0 || data[1] != 7)
 		return 0;
 
-	p->volume = val[2] / 127.0f;
+	p->volume = data[2] / 127.0f;
 	set_volume(this);
 	return 1;
 }
@@ -2071,7 +2074,9 @@ static int port_enum_formats(void *object,
 			*param = spa_pod_builder_add_object(builder,
 				SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
 				SPA_FORMAT_mediaType,      SPA_POD_Id(SPA_MEDIA_TYPE_application),
-				SPA_FORMAT_mediaSubtype,   SPA_POD_Id(SPA_MEDIA_SUBTYPE_control));
+				SPA_FORMAT_mediaSubtype,   SPA_POD_Id(SPA_MEDIA_SUBTYPE_control),
+				SPA_FORMAT_CONTROL_types,  SPA_POD_CHOICE_FLAGS_Int(
+					(1u<<SPA_CONTROL_UMP) | (1u<<SPA_CONTROL_Properties)));
 		} else {
 			struct spa_pod_frame f[1];
 			uint32_t rate = this->io_position ?
@@ -2177,7 +2182,9 @@ impl_node_port_enum_params(void *object, int seq,
 			param = spa_pod_builder_add_object(&b,
 				SPA_TYPE_OBJECT_Format,  id,
 				SPA_FORMAT_mediaType,    SPA_POD_Id(SPA_MEDIA_TYPE_application),
-				SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control));
+				SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control),
+				SPA_FORMAT_CONTROL_types,  SPA_POD_Int(
+					(1u<<SPA_CONTROL_UMP) | (1u<<SPA_CONTROL_Properties)));
 		else
 			param = spa_format_audio_raw_build(&b, id, &port->format.info.raw);
 		break;
@@ -2808,7 +2815,7 @@ static int channelmix_process_apply_sequence(struct impl *this,
 
 		if (prev) {
 			switch (prev->type) {
-			case SPA_CONTROL_Midi:
+			case SPA_CONTROL_UMP:
 				apply_midi(this, &prev->value);
 				break;
 			case SPA_CONTROL_Properties: