diff --git a/spa/plugins/audioconvert/channelmix-ops-c.c b/spa/plugins/audioconvert/channelmix-ops-c.c
index c0d12d541..8d4a02a0a 100644
--- a/spa/plugins/audioconvert/channelmix-ops-c.c
+++ b/spa/plugins/audioconvert/channelmix-ops-c.c
@@ -249,8 +249,9 @@ channelmix_f32_2_3p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else if (v0 == 1.0f && v1 == 1.0f) {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
-			d[0][n] = s[0][n];
-			d[1][n] = s[1][n];
+			float w = c * mix->widen;
+			d[0][n] = s[0][n] - w;
+			d[1][n] = s[1][n] - w;
 			d[2][n] = c;
 		}
 		lr4_process(&mix->lr4[3], d[3], d[2], v3, n_samples);
@@ -259,8 +260,9 @@ channelmix_f32_2_3p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
-			d[0][n] = s[0][n] * v0;
-			d[1][n] = s[1][n] * v1;
+			float w = c * mix->widen;
+			d[0][n] = (s[0][n] - w) * v0;
+			d[1][n] = (s[1][n] - w) * v1;
 			d[2][n] = c;
 		}
 		lr4_process(&mix->lr4[3], d[3], d[2], v3, n_samples);
@@ -290,9 +292,10 @@ channelmix_f32_2_5p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else if (v0 == 1.0f && v1 == 1.0f) {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
+			float w = c * mix->widen;
 			float m = s[0][n] - s[1][n];
-			d[0][n] = s[0][n];
-			d[1][n] = s[1][n];
+			d[0][n] = s[0][n] - w;
+			d[1][n] = s[1][n] - w;
 			d[3][n] = c;
 			d[5][n] = m;
 		}
@@ -307,9 +310,10 @@ channelmix_f32_2_5p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
+			float w = c * mix->widen;
 			float m = s[0][n] - s[1][n];
-			d[0][n] = s[0][n] * v0;
-			d[1][n] = s[1][n] * v1;
+			d[0][n] = (s[0][n] - w) * v0;
+			d[1][n] = (s[1][n] - w) * v1;
 			d[3][n] = c;
 			d[5][n] = m;
 		}
@@ -346,10 +350,13 @@ channelmix_f32_2_7p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else if (v0 == 1.0f && v1 == 1.0f && v4 == 1.0f && v5 == 1.0f) {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
+			float w = c * mix->widen;
 			float m = s[0][n] - s[1][n];
-			d[0][n] = d[4][n] = s[0][n];
-			d[1][n] = d[5][n] = s[1][n];
+			d[0][n] = s[0][n] - w;
+			d[1][n] = s[1][n] - w;
 			d[3][n] = c;
+			d[4][n] = s[0][n];
+			d[5][n] = s[1][n];
 			d[7][n] = m;
 		}
 		lr4_process(&mix->lr4[2], d[2], d[3], v2, n_samples);
@@ -363,9 +370,10 @@ channelmix_f32_2_7p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	else {
 		for (n = 0; n < n_samples; n++) {
 			float c = s[0][n] + s[1][n];
+			float w = c * mix->widen;
 			float m = s[0][n] - s[1][n];
-			d[0][n] = s[0][n] * v0;
-			d[1][n] = s[1][n] * v1;
+			d[0][n] = (s[0][n] - w) * v0;
+			d[1][n] = (s[1][n] - w) * v1;
 			d[3][n] = c;
 			d[4][n] = s[0][n] * v4;
 			d[5][n] = s[1][n] * v5;
diff --git a/spa/plugins/audioconvert/channelmix-ops.h b/spa/plugins/audioconvert/channelmix-ops.h
index 8500f401c..89a9172e6 100644
--- a/spa/plugins/audioconvert/channelmix-ops.h
+++ b/spa/plugins/audioconvert/channelmix-ops.h
@@ -72,6 +72,7 @@ struct channelmix {
 	float freq;					/* sample frequency */
 	float lfe_cutoff;				/* in Hz, 0 is disabled */
 	float rear_delay;				/* in ms, 0 is disabled */
+	float widen;					/* stereo widen. 0 is disabled */
 	struct lr4 lr4[SPA_AUDIO_MAX_CHANNELS];
 
 	float buffer[2][BUFFER_SIZE];
diff --git a/spa/plugins/audioconvert/channelmix.c b/spa/plugins/audioconvert/channelmix.c
index 2857e7cf2..4f5539fb2 100644
--- a/spa/plugins/audioconvert/channelmix.c
+++ b/spa/plugins/audioconvert/channelmix.c
@@ -518,6 +518,15 @@ static int impl_node_enum_params(void *object, int seq,
 					this->mix.rear_delay, 0.0, 1000.0),
 				SPA_PROP_INFO_params, SPA_POD_Bool(true));
 			break;
+		case 14:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.stereo-widen"),
+				SPA_PROP_INFO_description, SPA_POD_String("Stereo widen"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
+					this->mix.widen, 0.0, 1.0),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
 		default:
 			return 0;
 		}
@@ -571,6 +580,8 @@ static int impl_node_enum_params(void *object, int seq,
 			spa_pod_builder_float(&b, this->mix.lfe_cutoff);
 			spa_pod_builder_string(&b, "channelmix.rear-delay");
 			spa_pod_builder_float(&b, this->mix.rear_delay);
+			spa_pod_builder_string(&b, "channelmix.stereo-widen");
+			spa_pod_builder_float(&b, this->mix.widen);
 			spa_pod_builder_pop(&b, &f[1]);
 			param = spa_pod_builder_pop(&b, &f[0]);
 			break;
@@ -608,6 +619,8 @@ static int channelmix_set_param(struct impl *this, const char *k, const char *s)
 		spa_atof(s, &this->mix.lfe_cutoff);
 	else if (spa_streq(k, "channelmix.rear-delay"))
 		spa_atof(s, &this->mix.rear_delay);
+	else if (spa_streq(k, "channelmix.stereo-widen"))
+		spa_atof(s, &this->mix.widen);
 	else
 		return 0;
 	return 1;
diff --git a/src/daemon/client-rt.conf.in b/src/daemon/client-rt.conf.in
index 24caae996..80b061252 100644
--- a/src/daemon/client-rt.conf.in
+++ b/src/daemon/client-rt.conf.in
@@ -86,4 +86,5 @@ stream.properties = {
     #channelmix.upmix      = false
     #channelmix.lfe-cutoff = 0
     #channelmix.rear-delay = 12.0
+    #channelmix.stereo-widen = 0.0
 }
diff --git a/src/daemon/client.conf.in b/src/daemon/client.conf.in
index 69b6cb3f6..ce08f56be 100644
--- a/src/daemon/client.conf.in
+++ b/src/daemon/client.conf.in
@@ -76,4 +76,5 @@ stream.properties = {
     #channelmix.upmix      = false
     #channelmix.lfe-cutoff = 0
     #channelmix.rear-delay = 12.0
+    #channelmix.stereo-widen = 0.0
 }
diff --git a/src/daemon/minimal.conf.in b/src/daemon/minimal.conf.in
index c43596894..2a077b1ad 100644
--- a/src/daemon/minimal.conf.in
+++ b/src/daemon/minimal.conf.in
@@ -207,6 +207,7 @@ context.objects = [
             #channelmix.upmix       = false
             #channelmix.lfe-cutoff  = 0
             #channelmix.rear-delay  = 12.0
+            #channelmix.stereo-widen = 0.0
             channelmix.disable     = true
             #node.param.Props      = {
             #    params = [
@@ -263,6 +264,7 @@ context.objects = [
             #channelmix.upmix      = false
             #channelmix.lfe-cutoff = 0
             #channelmix.rear-delay = 12.0
+            #channelmix.stereo-widen = 0.0
             channelmix.disable     = true
             #node.param.Props      = {
             #    params = [
diff --git a/src/daemon/pipewire-pulse.conf.in b/src/daemon/pipewire-pulse.conf.in
index 89501ff0f..8145365a0 100644
--- a/src/daemon/pipewire-pulse.conf.in
+++ b/src/daemon/pipewire-pulse.conf.in
@@ -86,6 +86,7 @@ stream.properties = {
     #channelmix.upmix      = false
     #channelmix.lfe-cutoff = 0
     #channelmix.rear-delay = 12.0
+    #channelmix.stereo-widen = 0.0
 }
 
 # client/stream specific properties