diff --git a/src/main.c b/src/main.c
index 26801dc..1f0e808 100644
--- a/src/main.c
+++ b/src/main.c
@@ -27,7 +27,7 @@
 
 #define IQ_SAMPLES 32
 #define IQ_BLOCK_LEN (2 * IQ_SAMPLES)
-#define IQ_QUEUE_LEN 64
+#define IQ_QUEUE_LEN 4
 
 #define XOR_ADDR 0x1000
 #define LO_COS_ACCUMULATOR (&pio1->sm[2].pinctrl)