diff --git a/spa/plugins/audioconvert/audioconvert.c b/spa/plugins/audioconvert/audioconvert.c
index 7fe3a2d01..070d84056 100644
--- a/spa/plugins/audioconvert/audioconvert.c
+++ b/spa/plugins/audioconvert/audioconvert.c
@@ -1471,26 +1471,29 @@ static int setup_convert(struct impl *this)
 
 	rate = this->io_position ?  this->io_position->clock.rate.denom : DEFAULT_RATE;
 
-	if (in->format.info.raw.rate == 0 && in->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
+	/* in DSP mode we always convert to the DSP rate */
+	if (in->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
 		in->format.info.raw.rate = rate;
-	if (out->format.info.raw.rate == 0 && out->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
+	if (out->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
 		out->format.info.raw.rate = rate;
 
+	/* try to passthrough the rates */
 	if (in->format.info.raw.rate == 0)
 		in->format.info.raw.rate = out->format.info.raw.rate;
 	else if (out->format.info.raw.rate == 0)
 		out->format.info.raw.rate = in->format.info.raw.rate;
 
-	if (in->format.info.raw.rate == 0 && out->format.info.raw.rate == 0)
-		return -EINVAL;
-	if (in->format.info.raw.channels == 0 && out->format.info.raw.channels == 0)
-		return -EINVAL;
-
+	/* try to passthrough the channels */
 	if (in->format.info.raw.channels == 0)
 		in->format.info.raw.channels = out->format.info.raw.channels;
 	else if (out->format.info.raw.channels == 0)
 		out->format.info.raw.channels = in->format.info.raw.channels;
 
+	if (in->format.info.raw.rate == 0 || out->format.info.raw.rate == 0)
+		return -EINVAL;
+	if (in->format.info.raw.channels == 0 || out->format.info.raw.channels == 0)
+		return -EINVAL;
+
 	if ((res = setup_in_convert(this)) < 0)
 		return res;
 	if ((res = setup_channelmix(this)) < 0)
diff --git a/src/pipewire/context.c b/src/pipewire/context.c
index bcfa10485..24e754e1b 100644
--- a/src/pipewire/context.c
+++ b/src/pipewire/context.c
@@ -1382,6 +1382,9 @@ again:
 			 * panding change. Apply the change to the position now so
 			 * that we have the right values when we change the node
 			 * states of the driver and followers to RUNNING below */
+			pw_log_debug("%p: apply duration:%"PRIu64" rate:%u/%u", context,
+					n->current_quantum, n->current_rate.num,
+					n->current_rate.denom);
 			n->rt.position->clock.duration = n->current_quantum;
 			n->rt.position->clock.rate = n->current_rate;
 			n->current_pending = false;