diff --git a/pipewire-jack/src/pipewire-jack.c b/pipewire-jack/src/pipewire-jack.c
index 18ffb31c3..985396d47 100644
--- a/pipewire-jack/src/pipewire-jack.c
+++ b/pipewire-jack/src/pipewire-jack.c
@@ -2796,8 +2796,8 @@ jack_client_t * jack_client_open (const char *client_name,
 	if (client->context.context == NULL)
 		goto no_props;
 
-	client->allow_mlock = client->context.context->defaults.mem_allow_mlock;
-	client->warn_mlock = client->context.context->defaults.mem_warn_mlock;
+	client->allow_mlock = client->context.context->settings.mem_allow_mlock;
+	client->warn_mlock = client->context.context->settings.mem_warn_mlock;
 
 	if ((str = pw_context_get_conf_section(client->context.context,
 					"jack.properties")) != NULL)
diff --git a/src/modules/module-client-node/remote-node.c b/src/modules/module-client-node/remote-node.c
index f277dda3a..34fc199f0 100644
--- a/src/modules/module-client-node/remote-node.c
+++ b/src/modules/module-client-node/remote-node.c
@@ -1219,11 +1219,11 @@ static struct pw_proxy *node_export(struct pw_core *core, void *object, bool do_
 	data->client_node = (struct pw_client_node *)client_node;
 	data->remote_id = SPA_ID_INVALID;
 
-	data->allow_mlock = data->context->defaults.mem_allow_mlock;
+	data->allow_mlock = data->context->settings.mem_allow_mlock;
 	if ((str = pw_properties_get(node->properties, "mem.allow-mlock")) != NULL)
 		data->allow_mlock = pw_properties_parse_bool(str);
 
-	data->warn_mlock = data->context->defaults.mem_warn_mlock;
+	data->warn_mlock = data->context->settings.mem_warn_mlock;
 	if ((str = pw_properties_get(node->properties, "mem.warn-mlock")) != NULL)
 		data->warn_mlock = pw_properties_parse_bool(str);
 
diff --git a/src/pipewire/buffers.c b/src/pipewire/buffers.c
index 65e3d7ee4..063d06181 100644
--- a/src/pipewire/buffers.c
+++ b/src/pipewire/buffers.c
@@ -278,7 +278,7 @@ int pw_buffers_negotiate(struct pw_context *context, uint32_t flags,
 		offset += SPA_ROUND_UP_N(SPA_POD_SIZE(params[i]), 8);
 	}
 
-	max_buffers = context->defaults.link_max_buffers;
+	max_buffers = context->settings.link_max_buffers;
 
 	if ((str = pw_properties_get(context->properties, PW_KEY_CPU_MAX_ALIGN)) != NULL)
 		align = pw_properties_parse_int(str);
diff --git a/src/pipewire/context.c b/src/pipewire/context.c
index a84c29014..d3ec90548 100644
--- a/src/pipewire/context.c
+++ b/src/pipewire/context.c
@@ -47,9 +47,6 @@
 
 #define NAME "context"
 
-#define CLOCK_MIN_QUANTUM			4u
-#define CLOCK_MAX_QUANTUM			8192u
-
 #define DEFAULT_CLOCK_RATE			48000u
 #define DEFAULT_CLOCK_QUANTUM			1024u
 #define DEFAULT_CLOCK_MIN_QUANTUM		32u
@@ -141,26 +138,30 @@ static bool get_default_bool(struct pw_properties *properties, const char *name,
 static void fill_defaults(struct pw_context *this)
 {
 	struct pw_properties *p = this->properties;
-	this->defaults.clock_power_of_two_quantum = get_default_bool(p, "clock.power-of-two-quantum",
-			DEFAULT_CLOCK_POWER_OF_TWO_QUANTUM);
-	this->defaults.clock_rate = get_default_int(p, "default.clock.rate", DEFAULT_CLOCK_RATE);
-	this->defaults.clock_quantum = get_default_int(p, "default.clock.quantum", DEFAULT_CLOCK_QUANTUM);
-	this->defaults.clock_min_quantum = get_default_int(p, "default.clock.min-quantum", DEFAULT_CLOCK_MIN_QUANTUM);
-	this->defaults.clock_max_quantum = get_default_int(p, "default.clock.max-quantum", DEFAULT_CLOCK_MAX_QUANTUM);
-	this->defaults.video_size.width = get_default_int(p, "default.video.width", DEFAULT_VIDEO_WIDTH);
-	this->defaults.video_size.height = get_default_int(p, "default.video.height", DEFAULT_VIDEO_HEIGHT);
-	this->defaults.video_rate.num = get_default_int(p, "default.video.rate.num", DEFAULT_VIDEO_RATE_NUM);
-	this->defaults.video_rate.denom = get_default_int(p, "default.video.rate.denom", DEFAULT_VIDEO_RATE_DENOM);
-	this->defaults.link_max_buffers = get_default_int(p, "link.max-buffers", DEFAULT_LINK_MAX_BUFFERS);
-	this->defaults.mem_warn_mlock = get_default_bool(p, "mem.warn-mlock", DEFAULT_MEM_WARN_MLOCK);
-	this->defaults.mem_allow_mlock = get_default_bool(p, "mem.allow-mlock", DEFAULT_MEM_ALLOW_MLOCK);
+	struct settings *d = &this->defaults;
 
-	this->defaults.clock_max_quantum = SPA_CLAMP(this->defaults.clock_max_quantum,
+	d->clock_rate = get_default_int(p, "default.clock.rate", DEFAULT_CLOCK_RATE);
+	d->clock_quantum = get_default_int(p, "default.clock.quantum", DEFAULT_CLOCK_QUANTUM);
+	d->clock_min_quantum = get_default_int(p, "default.clock.min-quantum", DEFAULT_CLOCK_MIN_QUANTUM);
+	d->clock_max_quantum = get_default_int(p, "default.clock.max-quantum", DEFAULT_CLOCK_MAX_QUANTUM);
+	d->video_size.width = get_default_int(p, "default.video.width", DEFAULT_VIDEO_WIDTH);
+	d->video_size.height = get_default_int(p, "default.video.height", DEFAULT_VIDEO_HEIGHT);
+	d->video_rate.num = get_default_int(p, "default.video.rate.num", DEFAULT_VIDEO_RATE_NUM);
+	d->video_rate.denom = get_default_int(p, "default.video.rate.denom", DEFAULT_VIDEO_RATE_DENOM);
+
+	d->log_level = get_default_int(p, "log.level", pw_log_level);
+	d->clock_power_of_two_quantum = get_default_bool(p, "clock.power-of-two-quantum",
+			DEFAULT_CLOCK_POWER_OF_TWO_QUANTUM);
+	d->link_max_buffers = get_default_int(p, "link.max-buffers", DEFAULT_LINK_MAX_BUFFERS);
+	d->mem_warn_mlock = get_default_bool(p, "mem.warn-mlock", DEFAULT_MEM_WARN_MLOCK);
+	d->mem_allow_mlock = get_default_bool(p, "mem.allow-mlock", DEFAULT_MEM_ALLOW_MLOCK);
+
+	d->clock_max_quantum = SPA_CLAMP(d->clock_max_quantum,
 			CLOCK_MIN_QUANTUM, CLOCK_MAX_QUANTUM);
-	this->defaults.clock_min_quantum = SPA_CLAMP(this->defaults.clock_min_quantum,
-			CLOCK_MIN_QUANTUM, this->defaults.clock_max_quantum);
-	this->defaults.clock_quantum = SPA_CLAMP(this->defaults.clock_quantum,
-			this->defaults.clock_min_quantum, this->defaults.clock_max_quantum);
+	d->clock_min_quantum = SPA_CLAMP(d->clock_min_quantum,
+			CLOCK_MIN_QUANTUM, d->clock_max_quantum);
+	d->clock_quantum = SPA_CLAMP(d->clock_quantum,
+			d->clock_min_quantum, d->clock_max_quantum);
 }
 
 static int try_load_conf(struct pw_context *this, const char *conf_prefix,
@@ -306,6 +307,7 @@ struct pw_context *pw_context_new(struct pw_loop *main_loop,
 	}
 
 	fill_defaults(this);
+	this->settings = this->defaults;
 
 	pr = pw_properties_copy(properties);
 	if ((str = pw_properties_get(pr, "context.data-loop." PW_KEY_LIBRARY_NAME_SYSTEM)))
@@ -953,10 +955,24 @@ static int collect_nodes(struct pw_context *context, struct pw_impl_node *driver
 	return 0;
 }
 
+static inline void get_quantums(struct pw_context *context, uint32_t *def, uint32_t *min, uint32_t *max)
+{
+	struct settings *s = &context->settings;
+	*def = s->clock_force_quantum == 0 ? s->clock_quantum : s->clock_force_quantum;
+	*min = s->clock_force_quantum == 0 ? s->clock_min_quantum : s->clock_force_quantum;
+	*max = s->clock_force_quantum == 0 ? s->clock_max_quantum : s->clock_force_quantum;
+}
+static inline void get_rate(struct pw_context *context, uint32_t *def)
+{
+	struct settings *s = &context->settings;
+	*def = s->clock_force_rate == 0 ? s->clock_rate : s->clock_force_rate;
+}
+
 int pw_context_recalc_graph(struct pw_context *context, const char *reason)
 {
 	struct impl *impl = SPA_CONTAINER_OF(context, struct impl, this);
 	struct pw_impl_node *n, *s, *target, *fallback;
+	uint32_t max_quantum, min_quantum, def_quantum, def_rate;
 
 	pw_log_info(NAME" %p: busy:%d reason:%s", context, impl->recalc, reason);
 
@@ -968,6 +984,9 @@ int pw_context_recalc_graph(struct pw_context *context, const char *reason)
 again:
 	impl->recalc = true;
 
+	get_quantums(context, &def_quantum, &min_quantum, &max_quantum);
+	get_rate(context, &def_rate);
+
 	/* start from all drivers and group all nodes that are linked
 	 * to it. Some nodes are not (yet) linked to anything and they
 	 * will end up 'unassigned' to a driver. Other nodes are drivers
@@ -1036,7 +1055,6 @@ again:
 	/* assign final quantum and set state for followers and drivers */
 	spa_list_for_each(n, &context->driver_list, driver_link) {
 		bool running = false;
-		uint32_t max_quantum = context->defaults.clock_max_quantum;
 		uint32_t quantum = 0;
 
 		if (!n->driving || n->exported)
@@ -1057,12 +1075,11 @@ again:
 				running = !n->passive;
 		}
 		if (quantum == 0)
-			quantum = context->defaults.clock_quantum;
+			quantum = def_quantum;
 
-		quantum = SPA_CLAMP(quantum,
-				context->defaults.clock_min_quantum,
-				max_quantum);
+		quantum = SPA_CLAMP(quantum, min_quantum, max_quantum);
 
+		n->rt.position->clock.rate = SPA_FRACTION(1, def_rate);
 		if (n->rt.position && quantum != n->rt.position->clock.duration) {
 			pw_log_info("(%s-%u) new quantum:%"PRIu64"->%u",
 					n->name, n->info.id,
diff --git a/src/pipewire/filter.c b/src/pipewire/filter.c
index bf6a76667..33f08041c 100644
--- a/src/pipewire/filter.c
+++ b/src/pipewire/filter.c
@@ -1048,8 +1048,8 @@ filter_new(struct pw_context *context, const char *name,
 	this->state = PW_FILTER_STATE_UNCONNECTED;
 
 	impl->context = context;
-	impl->allow_mlock = context->defaults.mem_allow_mlock;
-	impl->warn_mlock = context->defaults.mem_warn_mlock;
+	impl->allow_mlock = context->settings.mem_allow_mlock;
+	impl->warn_mlock = context->settings.mem_warn_mlock;
 
 	return impl;
 
diff --git a/src/pipewire/impl-node.c b/src/pipewire/impl-node.c
index ead2778ac..a732a7213 100644
--- a/src/pipewire/impl-node.c
+++ b/src/pipewire/impl-node.c
@@ -879,16 +879,16 @@ static void check_properties(struct pw_impl_node *node)
 			uint32_t quantum_size;
 
 			node->latency = SPA_FRACTION(num, denom);
-			quantum_size = (num * context->defaults.clock_rate / denom);
-			if (context->defaults.clock_power_of_two_quantum)
+			quantum_size = (num * context->settings.clock_rate / denom);
+			if (context->settings.clock_power_of_two_quantum)
 				quantum_size = flp2(quantum_size);
 
 			if (quantum_size != node->quantum_size) {
 				pw_log_debug(NAME" %p: latency '%s' quantum %u/%u",
-						node, str, quantum_size, context->defaults.clock_rate);
+						node, str, quantum_size, context->settings.clock_rate);
 				pw_log_info("(%s-%u) latency:%s ->quantum %u/%u", node->name,
 						node->info.id, str, quantum_size,
-						context->defaults.clock_rate);
+						context->settings.clock_rate);
 				node->quantum_size = quantum_size;
 				recalc_reason = "quantum changed";
 			}
@@ -900,16 +900,16 @@ static void check_properties(struct pw_impl_node *node)
 			uint32_t max_quantum_size;
 
 			node->max_latency = SPA_FRACTION(num, denom);
-			max_quantum_size = (num * context->defaults.clock_rate / denom);
-			if (context->defaults.clock_power_of_two_quantum)
+			max_quantum_size = (num * context->settings.clock_rate / denom);
+			if (context->settings.clock_power_of_two_quantum)
 				max_quantum_size = flp2(max_quantum_size);
 
 			if (max_quantum_size != node->max_quantum_size) {
 				pw_log_debug(NAME" %p: max latency '%s' quantum %u/%u",
-						node, str, max_quantum_size, context->defaults.clock_rate);
+						node, str, max_quantum_size, context->settings.clock_rate);
 				pw_log_info("(%s-%u) max latency:%s ->quantum %u/%u", node->name,
 						node->info.id, str, max_quantum_size,
-						context->defaults.clock_rate);
+						context->settings.clock_rate);
 				node->max_quantum_size = max_quantum_size;
 				recalc_reason = "max quantum changed";
 			}
@@ -1105,7 +1105,7 @@ static void reset_segment(struct spa_io_segment *seg)
 static void reset_position(struct pw_impl_node *this, struct spa_io_position *pos)
 {
 	uint32_t i;
-	struct defaults *def = &this->context->defaults;
+	struct settings *def = &this->context->settings;
 
 	pos->clock.rate = SPA_FRACTION(1, def->clock_rate);
 	pos->clock.duration = def->clock_quantum;
diff --git a/src/pipewire/private.h b/src/pipewire/private.h
index c61789ff5..c12b989b7 100644
--- a/src/pipewire/private.h
+++ b/src/pipewire/private.h
@@ -49,7 +49,11 @@ struct ucred {
 #define spa_debug(...) pw_log_trace(__VA_ARGS__)
 #endif
 
-struct defaults {
+#define CLOCK_MIN_QUANTUM			4u
+#define CLOCK_MAX_QUANTUM			8192u
+
+struct settings {
+	uint32_t log_level;
 	uint32_t clock_rate;
 	uint32_t clock_quantum;
 	uint32_t clock_min_quantum;
@@ -60,6 +64,8 @@ struct defaults {
 	unsigned int mem_warn_mlock:1;
 	unsigned int mem_allow_mlock:1;
 	unsigned int clock_power_of_two_quantum:1;
+	uint32_t clock_force_rate;
+	uint32_t clock_force_quantum;
 };
 
 struct ratelimit {
@@ -378,7 +384,8 @@ struct pw_context {
 	struct pw_properties *conf;		/**< configuration of the context */
 	struct pw_properties *properties;	/**< properties of the context */
 
-	struct defaults defaults;		/**< default parameters */
+	struct settings defaults;		/**< default parameters */
+	struct settings settings;		/**< current parameters */
 
 	struct pw_mempool *pool;		/**< global memory pool */
 
diff --git a/src/pipewire/stream.c b/src/pipewire/stream.c
index 3b9a304d7..2f1c55ae9 100644
--- a/src/pipewire/stream.c
+++ b/src/pipewire/stream.c
@@ -1295,8 +1295,8 @@ stream_new(struct pw_context *context, const char *name,
 	this->state = PW_STREAM_STATE_UNCONNECTED;
 
 	impl->context = context;
-	impl->allow_mlock = context->defaults.mem_allow_mlock;
-	impl->warn_mlock = context->defaults.mem_warn_mlock;
+	impl->allow_mlock = context->settings.mem_allow_mlock;
+	impl->warn_mlock = context->settings.mem_warn_mlock;
 
 	spa_hook_list_append(&impl->context->driver_listener_list,
 			&impl->context_listener,