diff --git a/src/extensions/client-node.h b/src/extensions/client-node.h
index 67ebb7c0b..43bf94b82 100644
--- a/src/extensions/client-node.h
+++ b/src/extensions/client-node.h
@@ -44,6 +44,16 @@ struct pw_client_node_buffer {
 	struct spa_buffer *buffer;	/**< buffer describing metadata and buffer memory */
 };
 
+struct pw_client_node_position {
+#define PW_VERSION_CLIENT_NODE_POSITION		0
+	uint32_t version;
+	uint32_t seq1, seq2;		/**< valid contents when equal */
+	uint64_t nsec;			/**< time in nanoseconds */
+	struct spa_fraction rate;	/**< rate of the clock */
+	uint32_t position;		/**< current position expressed in rate */
+	uint32_t duration;		/**< duration of cycle expressed in rate */
+};
+
 #define PW_CLIENT_NODE_PROXY_METHOD_DONE		0
 #define PW_CLIENT_NODE_PROXY_METHOD_UPDATE		1
 #define PW_CLIENT_NODE_PROXY_METHOD_PORT_UPDATE		2
@@ -183,7 +193,8 @@ pw_client_node_proxy_destroy(struct pw_client_node_proxy *p)
 #define PW_CLIENT_NODE_PROXY_EVENT_PORT_USE_BUFFERS	8
 #define PW_CLIENT_NODE_PROXY_EVENT_PORT_COMMAND		9
 #define PW_CLIENT_NODE_PROXY_EVENT_PORT_SET_IO		10
-#define PW_CLIENT_NODE_PROXY_EVENT_NUM			11
+#define PW_CLIENT_NODE_PROXY_EVENT_SET_POSITION		11
+#define PW_CLIENT_NODE_PROXY_EVENT_NUM			12
 
 /** \ref pw_client_node events */
 struct pw_client_node_proxy_events {
@@ -340,6 +351,11 @@ struct pw_client_node_proxy_events {
 			     uint32_t mem_id,
 			     uint32_t offset,
 			     uint32_t size);
+
+	void (*set_position) (void *object,
+			      uint32_t mem_id,
+			      uint32_t offset,
+			      uint32_t size);
 };
 
 static inline void
@@ -373,6 +389,8 @@ pw_client_node_proxy_add_listener(struct pw_client_node_proxy *p,
 	pw_resource_notify(r,struct pw_client_node_proxy_events,port_command,__VA_ARGS__)
 #define pw_client_node_resource_port_set_io(r,...)	\
 	pw_resource_notify(r,struct pw_client_node_proxy_events,port_set_io,__VA_ARGS__)
+#define pw_client_node_resource_set_position(r,...)	\
+	pw_resource_notify(r,struct pw_client_node_proxy_events,set_position,__VA_ARGS__)
 
 #ifdef __cplusplus
 }  /* extern "C" */
diff --git a/src/modules/module-audio-session.c b/src/modules/module-audio-session.c
index 366f2bc66..1d92cbb76 100644
--- a/src/modules/module-audio-session.c
+++ b/src/modules/module-audio-session.c
@@ -298,6 +298,13 @@ static void reconfigure_session(struct session *sess)
 	}
 
 	sess->buffer_size = buffer_size;
+
+	sess->node->rt.quantum->rate.num = 1;
+	sess->node->rt.quantum->rate.denom = sess->sample_rate;
+	sess->node->rt.quantum->size = buffer_size;
+
+	pw_log_info("module %p: driver node:%p quantum:%d/%d",
+			impl, sess->node, sess->sample_rate, buffer_size);
 }
 
 static void node_info_destroy(void *data)
diff --git a/src/modules/module-client-node/client-node.c b/src/modules/module-client-node/client-node.c
index 14ba1f723..7398c45a1 100644
--- a/src/modules/module-client-node/client-node.c
+++ b/src/modules/module-client-node/client-node.c
@@ -150,6 +150,8 @@ struct impl {
 
 	int fds[2];
 	int other_fds[2];
+
+	struct pw_client_node_position *position;
 };
 
 /** \endcond */
@@ -890,14 +892,21 @@ impl_node_port_send_command(struct spa_node *node,
 static int impl_node_process(struct spa_node *node)
 {
 	struct node *this = SPA_CONTAINER_OF(node, struct node, node);
+	struct impl *impl = this->impl;
+	struct pw_driver_quantum *q;
 	uint64_t cmd = 1;
 
 	if (this->impl->this.status != SPA_ID_INVALID) {
 		spa_log_trace(this->log, "%p: return %d", this, this->impl->this.status);
-		return this->impl->this.status;
+		return impl->this.status;
 	}
 
-	spa_log_trace(this->log, "%p: send process", this);
+	spa_log_trace(this->log, "%p: send process %p", this, impl->this.node->driver_node);
+
+	q = impl->this.node->driver_node->rt.quantum;
+
+	impl->position->duration = q->size;
+	impl->position->rate = q->rate;
 
 	if (write(this->writefd, &cmd, 8) != 8)
 		spa_log_warn(this->log, "node %p: error %s", this, strerror(errno));
@@ -1148,6 +1157,8 @@ static void node_initialized(void *data)
 	struct pw_type *t = impl->t;
 	struct pw_global *global;
 	uint32_t node_id;
+	uint32_t area_size, size;
+	struct mem *m;
 
 	if (this->resource == NULL)
 		return;
@@ -1162,14 +1173,20 @@ static void node_initialized(void *data)
 	spa_loop_add_source(impl->node.data_loop, &impl->node.data_source);
 	pw_log_debug("client-node %p: transport fd %d %d", node, impl->fds[0], impl->fds[1]);
 
+	area_size = sizeof(struct spa_io_buffers) * MAX_AREAS;
+	size = area_size + sizeof(struct pw_client_node_position);
+
 	if (pw_memblock_alloc(PW_MEMBLOCK_FLAG_WITH_FD |
 			      PW_MEMBLOCK_FLAG_MAP_READWRITE |
 			      PW_MEMBLOCK_FLAG_SEAL,
-			      sizeof(struct spa_io_buffers) * MAX_AREAS,
+			      size,
 			      &impl->io_areas) < 0)
                 return;
 
-	ensure_mem(impl, impl->io_areas->fd, t->data.MemFd, impl->io_areas->flags);
+	impl->position = SPA_MEMBER(impl->io_areas->ptr,
+			area_size, struct pw_client_node_position);
+
+	m = ensure_mem(impl, impl->io_areas->fd, t->data.MemFd, impl->io_areas->flags);
 	pw_log_debug("client-node %p: io areas %p", node, impl->io_areas->ptr);
 
 	if ((global = pw_node_get_global(node)) != NULL)
@@ -1181,6 +1198,11 @@ static void node_initialized(void *data)
 					  node_id,
 					  impl->other_fds[0],
 					  impl->other_fds[1]);
+
+	pw_client_node_resource_set_position(this->resource,
+					     m->id,
+					     area_size,
+					     sizeof(struct pw_client_node_position));
 }
 
 static void node_free(void *data)
diff --git a/src/modules/module-client-node/client-stream.c b/src/modules/module-client-node/client-stream.c
index 90c95d547..7d13ec60e 100644
--- a/src/modules/module-client-node/client-stream.c
+++ b/src/modules/module-client-node/client-stream.c
@@ -98,6 +98,7 @@ struct impl {
 	struct pw_port_mix client_port_mix;
 
 	struct spa_io_buffers *io;
+	struct spa_io_control_range ctrl;
 
 	struct spa_buffer **buffers;
 	uint32_t n_buffers;
@@ -249,16 +250,29 @@ impl_node_add_port(struct spa_node *node, enum spa_direction direction, uint32_t
 {
 	struct node *this;
 	struct impl *impl;
+	struct pw_type *t;
+	int res;
 
 	spa_return_val_if_fail(node != NULL, -EINVAL);
 
 	this = SPA_CONTAINER_OF(node, struct node, node);
 	impl = this->impl;
+	t = impl->t;
 
 	if (direction != impl->direction)
 		return -EINVAL;
 
-	return spa_node_add_port(impl->adapter, direction, port_id);
+	if ((res = spa_node_add_port(impl->adapter, direction, port_id)) < 0)
+		return res;
+
+	if ((res = spa_node_port_set_io(impl->adapter,
+					direction, port_id,
+					t->io.ControlRange,
+					&impl->ctrl,
+					sizeof(&impl->ctrl))) < 0)
+			return res;
+
+	return res;
 }
 
 static int
@@ -670,10 +684,16 @@ static int impl_node_process(struct spa_node *node)
 	struct impl *impl = this->impl;
 	int status;
 
-	spa_log_trace(this->log, "%p: process", this);
+	impl->client_node->node->driver_node = impl->this.node->driver_node;
+	impl->ctrl.min_size = impl->ctrl.max_size =
+		impl->this.node->driver_node->rt.quantum->size;
 
-	if (impl->use_converter)
+
+	spa_log_trace(this->log, "%p: process %d", this, impl->ctrl.max_size);
+
+	if (impl->use_converter) {
 		status = spa_node_process(impl->adapter);
+	}
 	else {
 		status = SPA_STATUS_HAVE_BUFFER | SPA_STATUS_NEED_BUFFER;
 		spa_log_trace(this->log, "%p: process %d/%d %d/%d", this,
@@ -841,6 +861,7 @@ static void client_node_initialized(void *data)
 					impl->client_port_mix.io,
 					sizeof(impl->client_port_mix.io))) < 0)
 			return;
+
 	}
 
 	pw_node_register(impl->this.node, NULL, NULL, NULL);
diff --git a/src/modules/module-client-node/protocol-native.c b/src/modules/module-client-node/protocol-native.c
index 3929bc371..a2c3d2ebc 100644
--- a/src/modules/module-client-node/protocol-native.c
+++ b/src/modules/module-client-node/protocol-native.c
@@ -432,6 +432,25 @@ static int client_node_demarshal_port_set_io(void *object, void *data, size_t si
 	return 0;
 }
 
+static int client_node_demarshal_set_position(void *object, void *data, size_t size)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_parser prs;
+	uint32_t memid, off, sz;
+
+	spa_pod_parser_init(&prs, data, size, 0);
+	if (spa_pod_parser_get(&prs,
+			"["
+			"i", &memid,
+			"i", &off,
+			"i", &sz, NULL) < 0)
+		return -EINVAL;
+
+	pw_proxy_notify(proxy, struct pw_client_node_proxy_events, set_position,
+							memid, off, sz);
+	return 0;
+}
+
 static void
 client_node_marshal_add_mem(void *object,
 			    uint32_t mem_id,
@@ -671,6 +690,22 @@ client_node_marshal_port_set_io(void *object,
 	pw_protocol_native_end_resource(resource, b);
 }
 
+static void
+client_node_marshal_set_position(void *object,
+			         uint32_t memid,
+			         uint32_t offset,
+			         uint32_t size)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_builder *b;
+
+	b = pw_protocol_native_begin_resource(resource, PW_CLIENT_NODE_PROXY_EVENT_SET_POSITION);
+	spa_pod_builder_struct(b,
+			       "i", memid,
+			       "i", offset,
+			       "i", size);
+	pw_protocol_native_end_resource(resource, b);
+}
 
 static int client_node_demarshal_done(void *object, void *data, size_t size)
 {
@@ -857,6 +892,7 @@ static const struct pw_client_node_proxy_events pw_protocol_native_client_node_e
 	&client_node_marshal_port_use_buffers,
 	&client_node_marshal_port_command,
 	&client_node_marshal_port_set_io,
+	&client_node_marshal_set_position,
 };
 
 static const struct pw_protocol_native_demarshal pw_protocol_native_client_node_event_demarshal[] = {
@@ -871,6 +907,7 @@ static const struct pw_protocol_native_demarshal pw_protocol_native_client_node_
 	{ &client_node_demarshal_port_use_buffers, PW_PROTOCOL_NATIVE_REMAP },
 	{ &client_node_demarshal_port_command, PW_PROTOCOL_NATIVE_REMAP },
 	{ &client_node_demarshal_port_set_io, PW_PROTOCOL_NATIVE_REMAP },
+	{ &client_node_demarshal_set_position, PW_PROTOCOL_NATIVE_REMAP },
 };
 
 static const struct pw_protocol_marshal pw_protocol_native_client_node_marshal = {
diff --git a/src/pipewire/link.c b/src/pipewire/link.c
index 45e72c85f..27cc87b20 100644
--- a/src/pipewire/link.c
+++ b/src/pipewire/link.c
@@ -1194,14 +1194,16 @@ do_join_graphs(struct spa_loop *loop,
 		out_driver = SPA_FLAG_CHECK(out_graph->flags, SPA_GRAPH_FLAG_DRIVER);
 
 		if (out_driver) {
-			pw_log_debug("link %p: in_graph to out_graph", this);
 			src = in_graph;
 			dst = out_graph;
+			this->input->node->driver_node = this->output->node->driver_node;
+			pw_log_debug("link %p: in_graph to out_graph %p", this, this->output->node);
 		}
 		else {
-			pw_log_debug("link %p: out_graph to in_graph", this);
 			src = out_graph;
 			dst = in_graph;
+			this->output->node->driver_node = this->input->node->driver_node;
+			pw_log_debug("link %p: out_graph to in_graph %p", this, this->input->node);
 		}
 		move_graph(dst, src);
 	}
diff --git a/src/pipewire/node.c b/src/pipewire/node.c
index df59333de..c500b3230 100644
--- a/src/pipewire/node.c
+++ b/src/pipewire/node.c
@@ -56,6 +56,8 @@ struct impl {
 
 	struct pw_node_activation root_activation;
 	struct pw_node_activation node_activation;
+
+	struct pw_driver_quantum quantum;
 };
 
 struct resource_data {
@@ -421,6 +423,8 @@ static void check_properties(struct pw_node *node)
 	else
 		SPA_FLAG_UNSET(impl->driver_graph.flags, SPA_GRAPH_FLAG_DRIVER);
 
+	node->driver_node = node;
+
 	pw_log_debug("node %p: graph %p driver:%d", node, &impl->driver_graph, node->driver);
 
 }
@@ -509,6 +513,8 @@ struct pw_node *pw_node_new(struct pw_core *core,
 	spa_graph_node_init(&this->rt.node, &impl->node_activation.state);
 	spa_graph_node_add(&impl->graph, &this->rt.node);
 
+	this->rt.quantum = &impl->quantum;
+
 	check_properties(this);
 
 	return this;
diff --git a/src/pipewire/private.h b/src/pipewire/private.h
index 738da674a..6d813e949 100644
--- a/src/pipewire/private.h
+++ b/src/pipewire/private.h
@@ -223,6 +223,13 @@ struct pw_module {
 	void *user_data;                /**< module user_data */
 };
 
+struct pw_driver_quantum {
+	uint64_t time;			/**< time in nanoseconds */
+	struct spa_fraction rate;	/**< rate */
+	uint32_t position;		/**< current position expressed in rate */
+	uint32_t size;			/**< size of one period expressed in rate */
+};
+
 struct pw_node_activation {
 #define NOT_TRIGGERED	0
 #define TRIGGERED	1
@@ -257,6 +264,8 @@ struct pw_node {
 	bool master;			/**< a master node is one of the driver nodes that
 					  *  is selected to drive the graph */
 
+	struct pw_node *driver_node;
+
 	struct spa_clock *clock;	/**< handle to SPA clock if any */
 	struct spa_node *node;		/**< SPA node implementation */
 
@@ -277,6 +286,7 @@ struct pw_node {
 	struct pw_loop *data_loop;		/**< the data loop for this node */
 
 	struct {
+		struct pw_driver_quantum *quantum;
 		struct spa_graph *driver;
 		struct spa_graph_node root;
 		struct pw_node_activation *activation;
diff --git a/src/pipewire/remote.c b/src/pipewire/remote.c
index eea82cf3c..a0bc03609 100644
--- a/src/pipewire/remote.c
+++ b/src/pipewire/remote.c
@@ -104,6 +104,8 @@ struct node_data {
         struct pw_client_node_proxy *node_proxy;
 	struct spa_hook node_proxy_listener;
 	struct spa_hook proxy_listener;
+
+	struct pw_client_node_position *position;
 };
 
 /** \endcond */
@@ -525,7 +527,7 @@ on_rtsocket_condition(void *user_data, int fd, enum spa_io mask)
 		if (read(fd, &cmd, sizeof(uint64_t)) != sizeof(uint64_t))
 			pw_log_warn("proxy %p: read failed %m", proxy);
 
-		pw_log_trace("remote %p: process", data->remote);
+		pw_log_trace("remote %p: process %d", data->remote, data->position->duration);
 		spa_graph_run(node->graph->parent->graph);
 	}
 }
@@ -1196,6 +1198,37 @@ client_node_port_set_io(void *object,
 	}
 }
 
+static void
+client_node_set_position(void *object,
+                         uint32_t memid,
+                         uint32_t offset,
+                         uint32_t size)
+{
+	struct pw_proxy *proxy = object;
+	struct node_data *data = proxy->user_data;
+	struct mem *m;
+	void *ptr;
+
+	if (memid == SPA_ID_INVALID) {
+		ptr = NULL;
+		size = 0;
+	}
+	else {
+		m = find_mem(data, memid);
+		if (m == NULL) {
+			pw_log_warn("unknown memory id %u", memid);
+			return;
+		}
+		ptr = mem_map(data, &m->map, m->fd,
+			PROT_READ|PROT_WRITE, offset, size);
+		if (ptr == NULL)
+			return;
+		m->ref++;
+	}
+
+	pw_log_debug("node %p: set position %p", proxy, ptr);
+	data->position = ptr;
+}
 
 static const struct pw_client_node_proxy_events client_node_events = {
 	PW_VERSION_CLIENT_NODE_PROXY_EVENTS,
@@ -1210,6 +1243,7 @@ static const struct pw_client_node_proxy_events client_node_events = {
 	.port_use_buffers = client_node_port_use_buffers,
 	.port_command = client_node_port_command,
 	.port_set_io = client_node_port_set_io,
+	.set_position = client_node_set_position,
 };
 
 static void do_node_init(struct pw_proxy *proxy)