diff --git a/spa/plugins/audioconvert/channelmix-ops-c.c b/spa/plugins/audioconvert/channelmix-ops-c.c
index 020a12aeb..6bf92763e 100644
--- a/spa/plugins/audioconvert/channelmix-ops-c.c
+++ b/spa/plugins/audioconvert/channelmix-ops-c.c
@@ -317,6 +317,55 @@ channelmix_f32_2_5p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
 	}
 }
 
+void
+channelmix_f32_2_7p1_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
+		   const void * SPA_RESTRICT src[], uint32_t n_samples)
+{
+	uint32_t i, n, n_dst = mix->dst_chan;
+	float **d = (float **)dst;
+	const float **s = (const float **)src;
+	const float v0 = mix->matrix[0][0];
+	const float v1 = mix->matrix[1][1];
+	const float v2 = (mix->matrix[2][0] + mix->matrix[2][1]) * 0.5f;
+	const float v3 = (mix->matrix[3][0] + mix->matrix[3][1]) * 0.5f;
+	const float v4 = mix->matrix[4][0];
+	const float v5 = mix->matrix[5][1];
+	const float v6 = mix->matrix[6][0];
+	const float v7 = mix->matrix[7][1];
+
+	if (SPA_FLAG_IS_SET(mix->flags, CHANNELMIX_FLAG_ZERO)) {
+		for (i = 0; i < n_dst; i++)
+			memset(d[i], 0, n_samples * sizeof(float));
+	}
+	else if (v0 == 1.0f && v1 == 1.0f && v4 == 1.0f && v5 == 1.0f &&
+	    v6 == 1.0f && v7 == 1.0f) {
+		for (n = 0; n < n_samples; n++) {
+			float c = s[0][n] + s[1][n];
+			d[0][n] = d[4][n] = d[6][n] = s[0][n];
+			d[1][n] = d[5][n] = d[7][n] = s[1][n];
+			d[2][n] = c * v2;
+			d[3][n] = c * v3;
+		}
+		if (v3 > 0.0f)
+			lr4_process(&mix->lr4[3], d[3], n_samples);
+	}
+	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;
+			d[2][n] = c * v2;
+			d[3][n] = c * v3;
+			d[4][n] = s[0][n] * v4;
+			d[5][n] = s[1][n] * v5;
+			d[6][n] = s[0][n] * v6;
+			d[7][n] = s[1][n] * v7;
+		}
+		if (v3 > 0.0f)
+			lr4_process(&mix->lr4[3], d[3], n_samples);
+	}
+}
+
 /* FL+FR+FC+LFE+SL+SR -> FL+FR */
 void
 channelmix_f32_5p1_2_c(struct channelmix *mix, void * SPA_RESTRICT dst[],
diff --git a/spa/plugins/audioconvert/channelmix-ops.c b/spa/plugins/audioconvert/channelmix-ops.c
index ef98f5de3..72346ed47 100644
--- a/spa/plugins/audioconvert/channelmix-ops.c
+++ b/spa/plugins/audioconvert/channelmix-ops.c
@@ -84,6 +84,7 @@ static const struct channelmix_info {
 	{ 2, MASK_STEREO, 4, MASK_QUAD, channelmix_f32_2_4_c, 0, "f32_2_4_c" },
 	{ 2, MASK_STEREO, 4, MASK_3_1, channelmix_f32_2_3p1_c, 0, "f32_2_3p1_c" },
 	{ 2, MASK_STEREO, 6, MASK_5_1, channelmix_f32_2_5p1_c, 0, "f32_2_5p1_c" },
+	{ 2, MASK_STEREO, 8, MASK_7_1, channelmix_f32_2_7p1_c, 0, "f32_2_7p1_c" },
 #if defined (HAVE_SSE)
 	{ 6, MASK_5_1, 2, MASK_STEREO, channelmix_f32_5p1_2_sse, SPA_CPU_FLAG_SSE, "f32_5p1_2_sse" },
 #endif
diff --git a/spa/plugins/audioconvert/channelmix-ops.h b/spa/plugins/audioconvert/channelmix-ops.h
index 13721900b..48a26d4fb 100644
--- a/spa/plugins/audioconvert/channelmix-ops.h
+++ b/spa/plugins/audioconvert/channelmix-ops.h
@@ -103,6 +103,7 @@ DEFINE_FUNCTION(f32_3p1_1, c);
 DEFINE_FUNCTION(f32_2_4, c);
 DEFINE_FUNCTION(f32_2_3p1, c);
 DEFINE_FUNCTION(f32_2_5p1, c);
+DEFINE_FUNCTION(f32_2_7p1, c);
 DEFINE_FUNCTION(f32_5p1_2, c);
 DEFINE_FUNCTION(f32_5p1_3p1, c);
 DEFINE_FUNCTION(f32_5p1_4, c);