diff --git a/spa/plugins/audioconvert/fmt-ops-c.c b/spa/plugins/audioconvert/fmt-ops-c.c
index 401bbeb0b..95dfec7c2 100644
--- a/spa/plugins/audioconvert/fmt-ops-c.c
+++ b/spa/plugins/audioconvert/fmt-ops-c.c
@@ -98,6 +98,22 @@ conv_copy32_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_
 	spa_memcpy(dst[0], src[0], n_samples * sizeof(int32_t) * conv->n_channels);
 }
 
+void
+conv_copy64d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	uint32_t i, n_channels = conv->n_channels;
+	for (i = 0; i < n_channels; i++)
+		spa_memcpy(dst[i], src[i], n_samples * sizeof(int64_t));
+}
+
+void
+conv_copy64_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	spa_memcpy(dst[0], src[0], n_samples * sizeof(int64_t) * conv->n_channels);
+}
+
 void
 conv_u8d_to_f32d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
 		uint32_t n_samples)
@@ -649,6 +665,77 @@ conv_s24_32d_to_f32_c(struct convert *conv, void * SPA_RESTRICT dst[], const voi
 	}
 }
 
+void
+conv_f64d_to_f32d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (i = 0; i < n_channels; i++) {
+		const double *s = src[i];
+		float *d = dst[i];
+
+		for (j = 0; j < n_samples; j++)
+			d[j] = s[j];
+	}
+}
+
+void
+conv_f64_to_f32_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	uint32_t i, n_channels = conv->n_channels;
+	const double *s = src[0];
+	float *d = dst[0];
+
+	n_samples *= n_channels;
+
+	for (i = 0; i < n_samples; i++)
+		d[i] = s[i];
+}
+
+void
+conv_f64_to_f32d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const double *s = src[0];
+	float **d = (float **) dst;
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			d[i][j] = *s++;
+	}
+}
+
+void
+conv_f64s_to_f32d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const double *s = src[0];
+	float **d = (float **) dst;
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			d[i][j] = bswap_64(*s++);
+	}
+}
+
+void
+conv_f64d_to_f32_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const double **s = (const double **) src;
+	float *d = dst[0];
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			*d++ = s[i][j];
+	}
+}
+
 void
 conv_f32d_to_u8d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
 		uint32_t n_samples)
@@ -988,6 +1075,77 @@ conv_f32d_to_s32s_c(struct convert *conv, void * SPA_RESTRICT dst[], const void
 	}
 }
 
+void
+conv_f32d_to_f64d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (i = 0; i < n_channels; i++) {
+		const float *s = src[i];
+		double *d = dst[i];
+
+		for (j = 0; j < n_samples; j++)
+			d[j] = s[j];
+	}
+}
+
+void
+conv_f32_to_f64_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	uint32_t i, n_channels = conv->n_channels;
+	const float *s = src[0];
+	double *d = dst[0];
+
+	n_samples *= n_channels;
+
+	for (i = 0; i < n_samples; i++)
+		d[i] = s[i];
+}
+
+void
+conv_f32_to_f64d_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const float *s = src[0];
+	double **d = (double **) dst;
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			d[i][j] = *s++;
+	}
+}
+
+void
+conv_f32d_to_f64_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const float **s = (const float **) src;
+	double *d = dst[0];
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			*d++ = s[i][j];
+	}
+}
+
+void
+conv_f32d_to_f64s_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const float **s = (const float **) src;
+	double *d = dst[0];
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			*d++ = bswap_32(s[i][j]);
+	}
+}
+
 void
 conv_f32_to_u24_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
 		uint32_t n_samples)
@@ -1272,6 +1430,20 @@ conv_deinterleave_32s_c(struct convert *conv, void * SPA_RESTRICT dst[], const v
 	}
 }
 
+void
+conv_deinterleave_64_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const uint64_t *s = src[0];
+	uint64_t **d = (uint64_t **) dst;
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			d[i][j] = *s++;
+	}
+}
+
 void
 conv_interleave_8_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
 		uint32_t n_samples)
@@ -1343,3 +1515,17 @@ conv_interleave_32s_c(struct convert *conv, void * SPA_RESTRICT dst[], const voi
 			*d++ = bswap_32(s[i][j]);
 	}
 }
+
+void
+conv_interleave_64_c(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+		uint32_t n_samples)
+{
+	const int64_t **s = (const int64_t **) src;
+	uint64_t *d = dst[0];
+	uint32_t i, j, n_channels = conv->n_channels;
+
+	for (j = 0; j < n_samples; j++) {
+		for (i = 0; i < n_channels; i++)
+			*d++ = s[i][j];
+	}
+}
diff --git a/spa/plugins/audioconvert/fmt-ops.c b/spa/plugins/audioconvert/fmt-ops.c
index ee3eb92f3..90fb35461 100644
--- a/spa/plugins/audioconvert/fmt-ops.c
+++ b/spa/plugins/audioconvert/fmt-ops.c
@@ -138,6 +138,13 @@ static struct conv_info conv_table[] =
 
 	{ SPA_AUDIO_FORMAT_S24_32_OE, SPA_AUDIO_FORMAT_F32P, 0, 0, conv_s24_32s_to_f32d_c },
 
+	{ SPA_AUDIO_FORMAT_F64, SPA_AUDIO_FORMAT_F32, 0, 0, conv_f64_to_f32_c },
+	{ SPA_AUDIO_FORMAT_F64P, SPA_AUDIO_FORMAT_F32P, 0, 0, conv_f64d_to_f32d_c },
+	{ SPA_AUDIO_FORMAT_F64, SPA_AUDIO_FORMAT_F32P, 0, 0, conv_f64_to_f32d_c },
+	{ SPA_AUDIO_FORMAT_F64P, SPA_AUDIO_FORMAT_F32, 0, 0, conv_f64d_to_f32_c },
+
+	{ SPA_AUDIO_FORMAT_F64_OE, SPA_AUDIO_FORMAT_F32P, 0, 0, conv_f64s_to_f32d_c },
+
 	/* from f32 */
 	{ SPA_AUDIO_FORMAT_F32, SPA_AUDIO_FORMAT_U8, 0, 0, conv_f32_to_u8_c },
 	{ SPA_AUDIO_FORMAT_F32P, SPA_AUDIO_FORMAT_U8P, 0, 0, conv_f32d_to_u8d_c },
@@ -219,6 +226,13 @@ static struct conv_info conv_table[] =
 
 	{ SPA_AUDIO_FORMAT_F32P, SPA_AUDIO_FORMAT_S24_32_OE, 0, 0, conv_f32d_to_s24_32s_c },
 
+	{ SPA_AUDIO_FORMAT_F32, SPA_AUDIO_FORMAT_F64, 0, 0, conv_f32_to_f64_c },
+	{ SPA_AUDIO_FORMAT_F32P, SPA_AUDIO_FORMAT_F64P, 0, 0, conv_f32d_to_f64d_c },
+	{ SPA_AUDIO_FORMAT_F32, SPA_AUDIO_FORMAT_F64P, 0, 0, conv_f32_to_f64d_c },
+	{ SPA_AUDIO_FORMAT_F32P, SPA_AUDIO_FORMAT_F64, 0, 0, conv_f32d_to_f64_c },
+
+	{ SPA_AUDIO_FORMAT_F32P, SPA_AUDIO_FORMAT_F64_OE, 0, 0, conv_f32d_to_f64s_c },
+
 	/* u8 */
 	{ SPA_AUDIO_FORMAT_U8, SPA_AUDIO_FORMAT_U8, 0, 0, conv_copy8_c },
 	{ SPA_AUDIO_FORMAT_U8P, SPA_AUDIO_FORMAT_U8P, 0, 0, conv_copy8d_c },
@@ -259,6 +273,12 @@ static struct conv_info conv_table[] =
 	{ SPA_AUDIO_FORMAT_S24_32P, SPA_AUDIO_FORMAT_S24_32P, 0, 0, conv_copy32d_c },
 	{ SPA_AUDIO_FORMAT_S24_32, SPA_AUDIO_FORMAT_S24_32P, 0, 0, conv_deinterleave_32_c },
 	{ SPA_AUDIO_FORMAT_S24_32P, SPA_AUDIO_FORMAT_S24_32, 0, 0, conv_interleave_32_c },
+
+	/* F64 */
+	{ SPA_AUDIO_FORMAT_F64, SPA_AUDIO_FORMAT_F64, 0, 0, conv_copy64_c },
+	{ SPA_AUDIO_FORMAT_F64P, SPA_AUDIO_FORMAT_F64P, 0, 0, conv_copy64d_c },
+	{ SPA_AUDIO_FORMAT_F64, SPA_AUDIO_FORMAT_F64P, 0, 0, conv_deinterleave_64_c },
+	{ SPA_AUDIO_FORMAT_F64P, SPA_AUDIO_FORMAT_F64, 0, 0, conv_interleave_64_c },
 };
 
 #define MATCH_CHAN(a,b)		((a) == 0 || (a) == (b))
diff --git a/spa/plugins/audioconvert/fmt-ops.h b/spa/plugins/audioconvert/fmt-ops.h
index e05b7b01a..6cf524760 100644
--- a/spa/plugins/audioconvert/fmt-ops.h
+++ b/spa/plugins/audioconvert/fmt-ops.h
@@ -207,6 +207,8 @@ DEFINE_FUNCTION(copy24d, c);
 DEFINE_FUNCTION(copy24, c);
 DEFINE_FUNCTION(copy32d, c);
 DEFINE_FUNCTION(copy32, c);
+DEFINE_FUNCTION(copy64d, c);
+DEFINE_FUNCTION(copy64, c);
 DEFINE_FUNCTION(u8d_to_f32d, c);
 DEFINE_FUNCTION(u8_to_f32, c);
 DEFINE_FUNCTION(u8_to_f32d, c);
@@ -245,6 +247,11 @@ DEFINE_FUNCTION(s24_32_to_f32, c);
 DEFINE_FUNCTION(s24_32_to_f32d, c);
 DEFINE_FUNCTION(s24_32s_to_f32d, c);
 DEFINE_FUNCTION(s24_32d_to_f32, c);
+DEFINE_FUNCTION(f64d_to_f32d, c);
+DEFINE_FUNCTION(f64_to_f32, c);
+DEFINE_FUNCTION(f64_to_f32d, c);
+DEFINE_FUNCTION(f64s_to_f32d, c);
+DEFINE_FUNCTION(f64d_to_f32, c);
 DEFINE_FUNCTION(f32d_to_u8d, c);
 DEFINE_FUNCTION(f32_to_u8, c);
 DEFINE_FUNCTION(f32_to_u8d, c);
@@ -283,16 +290,25 @@ DEFINE_FUNCTION(f32_to_s24_32, c);
 DEFINE_FUNCTION(f32_to_s24_32d, c);
 DEFINE_FUNCTION(f32d_to_s24_32, c);
 DEFINE_FUNCTION(f32d_to_s24_32s, c);
+DEFINE_FUNCTION(f32d_to_f64d, c);
+DEFINE_FUNCTION(f32_to_f64, c);
+DEFINE_FUNCTION(f32_to_f64d, c);
+DEFINE_FUNCTION(f32d_to_f64, c);
+DEFINE_FUNCTION(f32d_to_f64s, c);
 DEFINE_FUNCTION(deinterleave_8, c);
 DEFINE_FUNCTION(deinterleave_16, c);
 DEFINE_FUNCTION(deinterleave_24, c);
 DEFINE_FUNCTION(deinterleave_32, c);
 DEFINE_FUNCTION(deinterleave_32s, c);
+DEFINE_FUNCTION(deinterleave_64, c);
+DEFINE_FUNCTION(deinterleave_64s, c);
 DEFINE_FUNCTION(interleave_8, c);
 DEFINE_FUNCTION(interleave_16, c);
 DEFINE_FUNCTION(interleave_24, c);
 DEFINE_FUNCTION(interleave_32, c);
 DEFINE_FUNCTION(interleave_32s, c);
+DEFINE_FUNCTION(interleave_64, c);
+DEFINE_FUNCTION(interleave_64s, c);
 
 #if defined(HAVE_NEON)
 DEFINE_FUNCTION(s16_to_f32d_2, neon);
diff --git a/spa/plugins/audioconvert/test-fmt-ops.c b/spa/plugins/audioconvert/test-fmt-ops.c
index 2dace7093..48253b4a2 100644
--- a/spa/plugins/audioconvert/test-fmt-ops.c
+++ b/spa/plugins/audioconvert/test-fmt-ops.c
@@ -41,10 +41,10 @@
 
 static uint32_t cpu_flags;
 
-static uint8_t samp_in[N_SAMPLES * 4];
-static uint8_t samp_out[N_SAMPLES * 4];
-static uint8_t temp_in[N_SAMPLES * N_CHANNELS * 4];
-static uint8_t temp_out[N_SAMPLES * N_CHANNELS * 4];
+static uint8_t samp_in[N_SAMPLES * 8];
+static uint8_t samp_out[N_SAMPLES * 8];
+static uint8_t temp_in[N_SAMPLES * N_CHANNELS * 8];
+static uint8_t temp_out[N_SAMPLES * N_CHANNELS * 8];
 
 static void compare_mem(int i, int j, const void *m1, const void *m2, size_t size)
 {
@@ -92,6 +92,9 @@ static void run_test(const char *name,
 		case 4:
 			conv_interleave_32_c(&conv, tp, ip, N_SAMPLES);
 			break;
+		case 8:
+			conv_interleave_64_c(&conv, tp, ip, N_SAMPLES);
+			break;
 		default:
 			fprintf(stderr, "unknown size %zd\n", in_size);
 			return;
@@ -430,6 +433,35 @@ static void test_s24_32_f32(void)
 			false, false, conv_s24_32d_to_f32d_c);
 }
 
+static void test_f64_f32(void)
+{
+	static const double in[] = { 0.0, 1.0, -1.0, 0.4999999404, -0.4999999404, };
+	static const float out[] = { 0.0f, 1.0f, -1.0f, 0.4999999404f, -0.4999999404f, };
+
+	run_test("test_f64_f32d", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			true, false, conv_f64_to_f32d_c);
+	run_test("test_f64d_f32", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			false, true, conv_f64d_to_f32_c);
+	run_test("test_f64_f32", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			true, true, conv_f64_to_f32_c);
+	run_test("test_f64d_f32d", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			false, false, conv_f64d_to_f32d_c);
+}
+
+static void test_f32_f64(void)
+{
+	static const float in[] = { 0.0f, 1.0f, -1.0f, 0.5f, -0.5f, 1.1f, -1.1f };
+	static const double out[] = { 0.0, 1.0, -1.0, 0.5, -0.5, 1.1, -1.1 };
+
+	run_test("test_f32_f64", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			true, true, conv_f32_to_f64_c);
+	run_test("test_f32d_f64", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			false, true, conv_f32d_to_f64_c);
+	run_test("test_f32_f64d", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			true, false, conv_f32_to_f64d_c);
+	run_test("test_f32d_f64d", in, sizeof(in[0]), out, sizeof(out[0]), SPA_N_ELEMENTS(out),
+			false, false, conv_f32d_to_f64d_c);
+}
 int main(int argc, char *argv[])
 {
 	cpu_flags = get_cpu_flags();
@@ -453,5 +485,7 @@ int main(int argc, char *argv[])
 	test_u24_32_f32();
 	test_f32_s24_32();
 	test_s24_32_f32();
+	test_f32_f64();
+	test_f64_f32();
 	return 0;
 }