diff --git a/spa/plugins/audioconvert/noise-ops.h b/spa/plugins/audioconvert/noise-ops.h
new file mode 100644
index 000000000..5f9cee027
--- /dev/null
+++ b/spa/plugins/audioconvert/noise-ops.h
@@ -0,0 +1,62 @@
+/* Spa
+ *
+ * Copyright © 2022 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+
+#include <spa/utils/defs.h>
+#include <spa/param/audio/raw.h>
+
+#define NOISE_SIZE	(1<<8)
+#define NOISE_MOD	(NOISE_SIZE-1)
+
+struct noise {
+	uint32_t intensity;
+	uint32_t n_channels;
+	uint32_t cpu_flags;
+
+	struct spa_log *log;
+
+	void (*process) (struct noise *ns, void * SPA_RESTRICT dst[], uint32_t n_samples);
+	void (*free) (struct noise *ns);
+
+	float tab[NOISE_SIZE];
+	int tab_idx;
+};
+
+int noise_init(struct noise *ns);
+
+#define noise_process(ns,...)		(ns)->process(ns, __VA_ARGS__)
+#define noise_free(ns)			(ns)->free(ns)
+
+#define DEFINE_FUNCTION(name,arch)			\
+void noise_##name##_##arch(struct noise *ns,		\
+		void * SPA_RESTRICT dst[],		\
+		uint32_t n_samples);
+
+#define NOISE_OPS_MAX_ALIGN	16
+
+DEFINE_FUNCTION(f32, c);
+
+#undef DEFINE_FUNCTION