diff --git a/spa/plugins/filter-graph/filter-graph.c b/spa/plugins/filter-graph/filter-graph.c
index 7cafac9ff..c806da591 100644
--- a/spa/plugins/filter-graph/filter-graph.c
+++ b/spa/plugins/filter-graph/filter-graph.c
@@ -1058,8 +1058,8 @@ static struct descriptor *descriptor_load(struct impl *impl, const char *type,
 			}
 		} else if (SPA_FGA_IS_PORT_CONTROL(fp->flags)) {
 			if (SPA_FGA_IS_PORT_INPUT(fp->flags)) {
-				spa_log_info(impl->log, "using port %lu ('%s') as control %d", p,
-						fp->name, desc->n_control);
+				spa_log_info(impl->log, "using port %lu ('%s') as control %d %f/%f/%f", p,
+						fp->name, desc->n_control, fp->def, fp->min, fp->max);
 				desc->control[desc->n_control++] = p;
 			}
 			else if (SPA_FGA_IS_PORT_OUTPUT(fp->flags)) {
diff --git a/spa/plugins/filter-graph/plugin_ladspa.c b/spa/plugins/filter-graph/plugin_ladspa.c
index d5c8ef488..1aebafe35 100644
--- a/spa/plugins/filter-graph/plugin_ladspa.c
+++ b/spa/plugins/filter-graph/plugin_ladspa.c
@@ -7,6 +7,7 @@
 #include <dlfcn.h>
 #include <math.h>
 #include <limits.h>
+#include <float.h>
 
 #include <spa/utils/result.h>
 #include <spa/utils/defs.h>
@@ -113,8 +114,14 @@ static void ladspa_port_update_ranges(struct descriptor *dd, struct spa_fga_port
 	LADSPA_PortRangeHintDescriptor hint = d->PortRangeHints[p].HintDescriptor;
 	LADSPA_Data lower, upper;
 
-	lower = d->PortRangeHints[p].LowerBound;
-	upper = d->PortRangeHints[p].UpperBound;
+	if (hint & LADSPA_HINT_BOUNDED_BELOW)
+		lower = d->PortRangeHints[p].LowerBound;
+	else
+		lower = -FLT_MAX;
+	if (hint & LADSPA_HINT_BOUNDED_ABOVE)
+		upper = d->PortRangeHints[p].UpperBound;
+	else
+		upper = FLT_MAX;
 
 	port->hint = 0;
 	if (hint & LADSPA_HINT_TOGGLED)