diff --git a/module_usb_audio/audio.xc b/module_usb_audio/audio.xc
index 637a97b9..c36f6bf6 100755
--- a/module_usb_audio/audio.xc
+++ b/module_usb_audio/audio.xc
@@ -470,6 +470,8 @@ static inline void doI2SClocks(unsigned divide)
 #endif
         }
 
+#if 0
+        /* TODO - requires clock gen */
 #if defined(SPDIF_RX) || defined(ADAT_RX)
         inuint(c_dig_rx);
 #endif
@@ -492,6 +494,7 @@ static inline void doI2SClocks(unsigned divide)
 #if defined(SPDIF_RX) || defined(ADAT_RX)
         /* Request digital data (with prefill) */
         outuint(c_dig_rx, 0);
+#endif
 #endif
 
         tmp = 0;