diff --git a/spa/plugins/audioconvert/channelmix-ops-sse.c b/spa/plugins/audioconvert/channelmix-ops-sse.c
index 43a9af54a..ccc9e3a72 100644
--- a/spa/plugins/audioconvert/channelmix-ops-sse.c
+++ b/spa/plugins/audioconvert/channelmix-ops-sse.c
@@ -21,13 +21,11 @@
 
 static void
 channelmix_copy_sse(void *data, int n_dst, void *dst[n_dst],
-	   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+	   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float), unrolled, remain;
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
         __m128 vol = _mm_set1_ps(v);
 
 	if (v <= VOLUME_MIN) {
@@ -55,13 +53,11 @@ channelmix_copy_sse(void *data, int n_dst, void *dst[n_dst],
 
 static void
 channelmix_f32_2_4_sse(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float), unrolled, remain;
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
         __m128 vol = _mm_set1_ps(v);
 	__m128 in;
 	float *dFL = d[0], *dFR = d[1], *dRL = d[2], *dRR = d[3];
@@ -118,13 +114,12 @@ channelmix_f32_2_4_sse(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR -> FL+FR */
 static void
 channelmix_f32_5p1_2_sse(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int n, n_samples = n_bytes / sizeof(float), unrolled, remain;
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
         __m128 clev = _mm_set1_ps(m[2]);
         __m128 llev = _mm_set1_ps(m[3]);
         __m128 slev = _mm_set1_ps(m[4]);
@@ -205,13 +200,12 @@ channelmix_f32_5p1_2_sse(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR -> FL+FR+RL+RR*/
 static void
 channelmix_f32_5p1_4_sse(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float), unrolled, remain;
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
         __m128 clev = _mm_set1_ps(m[2]);
         __m128 llev = _mm_set1_ps(m[3]);
         __m128 vol = _mm_set1_ps(v);
diff --git a/spa/plugins/audioconvert/channelmix-ops.c b/spa/plugins/audioconvert/channelmix-ops.c
index 1e47823f3..1be5bfdd8 100644
--- a/spa/plugins/audioconvert/channelmix-ops.c
+++ b/spa/plugins/audioconvert/channelmix-ops.c
@@ -31,13 +31,11 @@
 
 static void
 channelmix_copy(void *data, int n_dst, void *dst[n_dst],
-	   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+	   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		for (i = 0; i < n_dst; i++)
@@ -58,7 +56,7 @@ channelmix_copy(void *data, int n_dst, void *dst[n_dst],
 
 static void
 channelmix_f32_n_m(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, j, n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **) dst;
@@ -69,7 +67,7 @@ channelmix_f32_n_m(void *data, int n_dst, void *dst[n_dst],
 		for (i = 0; i < n_dst; i++) {
 			float sum = 0.0f;
 			for (j = 0; j < n_src; j++)
-				sum += s[j][n] * m[i * n_src + j];
+				sum += s[j][n] * m[i * n_src + j] * v;
 			d[i][n] = sum;
 		}
 	}
@@ -80,13 +78,11 @@ channelmix_f32_n_m(void *data, int n_dst, void *dst[n_dst],
 
 static void
 channelmix_f32_1_2(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		memset(d[0], 0, n_bytes);
@@ -104,13 +100,11 @@ channelmix_f32_1_2(void *data, int n_dst, void *dst[n_dst],
 
 static void
 channelmix_f32_2_1(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		memset(d[0], 0, n_bytes);
@@ -127,13 +121,11 @@ channelmix_f32_2_1(void *data, int n_dst, void *dst[n_dst],
 
 static void
 channelmix_f32_2_4(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		for (i = 0; i < n_dst; i++)
@@ -156,13 +148,11 @@ channelmix_f32_2_4(void *data, int n_dst, void *dst[n_dst],
 #define MASK_3_1	_M(FL)|_M(FR)|_M(FC)|_M(LFE)
 static void
 channelmix_f32_2_3p1(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		for (i = 0; i < n_dst; i++)
@@ -190,13 +180,11 @@ channelmix_f32_2_3p1(void *data, int n_dst, void *dst[n_dst],
 #define MASK_5_1	_M(FL)|_M(FR)|_M(FC)|_M(LFE)|_M(SL)|_M(SR)|_M(RL)|_M(RR)
 static void
 channelmix_f32_2_5p1(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **)dst;
 	float **s = (float **)src;
-	float *m = matrix;
-	float v = m[0];
 
 	if (v <= VOLUME_MIN) {
 		for (i = 0; i < n_dst; i++)
@@ -224,13 +212,12 @@ channelmix_f32_2_5p1(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR -> FL+FR */
 static void
 channelmix_f32_5p1_2(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
 	const float clev = m[2];
 	const float llev = m[3];
 	const float slev = m[4];
@@ -258,13 +245,11 @@ channelmix_f32_5p1_2(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR -> FL+FR+FC+LFE*/
 static void
 channelmix_f32_5p1_3p1(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples;
 	float **d = (float **) dst;
 	float **s = (float **) src;
-	float *m = matrix;
-	float v = m[0];
 
 	n_samples = n_bytes / sizeof(float);
 	if (v <= VOLUME_MIN) {
@@ -285,13 +270,12 @@ channelmix_f32_5p1_3p1(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR -> FL+FR+RL+RR*/
 static void
 channelmix_f32_5p1_4(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples;
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
 	const float clev = m[2];
 	const float llev = m[3];
 
@@ -325,13 +309,12 @@ channelmix_f32_5p1_4(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR+RL+RR -> FL+FR */
 static void
 channelmix_f32_7p1_2(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int n, n_samples = n_bytes / sizeof(float);
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
 	const float clev = m[2];
 	const float llev = m[3];
 	const float slev = m[4];
@@ -359,13 +342,11 @@ channelmix_f32_7p1_2(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR+RL+RR -> FL+FR+FC+LFE*/
 static void
 channelmix_f32_7p1_3p1(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples;
 	float **d = (float **) dst;
 	float **s = (float **) src;
-	float *m = matrix;
-	float v = m[0];
 
 	n_samples = n_bytes / sizeof(float);
 	if (v <= VOLUME_MIN) {
@@ -386,13 +367,12 @@ channelmix_f32_7p1_3p1(void *data, int n_dst, void *dst[n_dst],
 /* FL+FR+FC+LFE+SL+SR+RL+RR -> FL+FR+RL+RR*/
 static void
 channelmix_f32_7p1_4(void *data, int n_dst, void *dst[n_dst],
-		   int n_src, const void *src[n_src], void *matrix, int n_bytes)
+		   int n_src, const void *src[n_src], void *matrix, float v, int n_bytes)
 {
 	int i, n, n_samples;
 	float **d = (float **) dst;
 	float **s = (float **) src;
 	float *m = matrix;
-	float v = m[0];
 	const float clev = m[2];
 	const float llev = m[3];
 	const float slev = m[4];
@@ -428,7 +408,7 @@ channelmix_f32_7p1_4(void *data, int n_dst, void *dst[n_dst],
 
 typedef void (*channelmix_func_t) (void *data, int n_dst, void *dst[n_dst],
 				   int n_src, const void *src[n_src],
-				   void *matrix, int n_bytes);
+				   void *matrix, float v, int n_bytes);
 
 
 static const struct channelmix_info {
diff --git a/spa/plugins/audioconvert/channelmix.c b/spa/plugins/audioconvert/channelmix.c
index cf287eca2..1da591bd2 100644
--- a/spa/plugins/audioconvert/channelmix.c
+++ b/spa/plugins/audioconvert/channelmix.c
@@ -41,14 +41,17 @@
 
 struct impl;
 
+#define DEFAULT_MUTE	false
 #define DEFAULT_VOLUME	1.0
 
 struct props {
 	float volume;
+	bool mute;
 };
 
 static void props_reset(struct props *props)
 {
+	props->mute = DEFAULT_MUTE;
 	props->volume = DEFAULT_VOLUME;
 }
 
@@ -98,6 +101,7 @@ struct impl {
 	bool started;
 
 	channelmix_func_t convert;
+	uint32_t n_matrix;
 	float matrix[4096];
 };
 
@@ -340,6 +344,7 @@ static int make_matrix(struct impl *this,
 		}
 		max = SPA_MAX(max, sum);
 	}
+	this->n_matrix = c;
 	for (i = 0; i < dst_chan; i++) {
 		for (j = 0; j < src_chan; j++) {
 			spa_log_debug(this->log, "%d %d: %f", i, j, this->matrix[i * src_chan + j]);
@@ -412,10 +417,47 @@ static int impl_node_enum_params(struct spa_node *node,
 	return -ENOTSUP;
 }
 
+static int apply_props(struct impl *this, const struct spa_pod *param)
+{
+	struct spa_pod_prop *prop;
+	struct spa_pod_object *obj = (struct spa_pod_object *) param;
+	struct props *p = &this->props;
+
+	SPA_POD_OBJECT_FOREACH(obj, prop) {
+		float volume;
+		bool mute;
+		switch (prop->key) {
+		case SPA_PROP_volume:
+			volume = SPA_POD_VALUE(struct spa_pod_float, &prop->value);
+			p->volume = volume;
+			break;
+		case SPA_PROP_mute:
+			mute = SPA_POD_VALUE(struct spa_pod_bool, &prop->value);
+			p->mute = mute;
+			break;
+		default:
+			break;
+		}
+	}
+	return 0;
+}
+
 static int impl_node_set_param(struct spa_node *node, uint32_t id, uint32_t flags,
 			       const struct spa_pod *param)
 {
-	return -ENOTSUP;
+	struct impl *this;
+
+	spa_return_val_if_fail(node != NULL, -EINVAL);
+
+	this = SPA_CONTAINER_OF(node, struct impl, node);
+
+	switch (id) {
+	case SPA_PARAM_Props:
+		return apply_props(this, param);
+	default:
+		return -ENOENT;
+	}
+	return 0;
 }
 
 static int impl_node_send_command(struct spa_node *node, const struct spa_command *command)
@@ -941,26 +983,8 @@ static int process_control(struct impl *this, struct port *port, struct spa_pod_
 	SPA_POD_SEQUENCE_FOREACH(sequence, c) {
 		switch (c->type) {
 		case SPA_CONTROL_Properties:
-		{
-			struct props *p = &this->props;
-			float volume = p->volume;
-			struct spa_pod_prop *prop;
-			struct spa_pod_object *obj = (struct spa_pod_object *) &c->value;
-
-			SPA_POD_OBJECT_FOREACH(obj, prop) {
-				switch (prop->key) {
-				case SPA_PROP_volume:
-					volume = SPA_POD_VALUE(struct spa_pod_float, &prop->value);
-					if (volume != p->volume)
-						this->matrix[0] = p->volume = volume;
-					break;
-				default:
-					break;
-				}
-			}
-
+			apply_props(this, (const struct spa_pod *) &c->value);
 			break;
-		}
 		default:
 			break;
                 }
@@ -1033,7 +1057,8 @@ static int impl_node_process(struct spa_node *node)
 
 		this->convert(this, n_dst_datas, dst_datas,
 				    n_src_datas, src_datas,
-				    this->matrix, n_bytes);
+				    this->matrix, this->props.mute ? 0.0 : this->props.volume,
+				    n_bytes);
 	}
 
 	outio->status = SPA_STATUS_HAVE_BUFFER;