diff --git a/main.c b/main.c
index 75e9bb2f..6405c768 100644
--- a/main.c
+++ b/main.c
@@ -97,6 +97,13 @@ int main(int argc, char * argv[]) {
 	  hab_mode = TRUE;
 	  fprintf(stderr, "HAB mode is ON\n");
   }
+
+  FILE * gpiod = popen("sudo pigpiod", "r");  // start gpiod
+  pclose(gpiod);
+  gpiod = popen("pigs m 19 5", "r");		// set PWM audio utput to GPIO 19 (pin 35)
+  pclose(gpiod);	
+  gpiod = popen("pigs hc 13 12880000", "r");		// set clock to 12.88 MHz on GPIO 13 (pin 33)
+  pclose(gpiod);	
 	
 //  FILE * rpitx_stop = popen("sudo systemctl stop rpitx", "r");
   FILE * rpitx_stop = popen("sudo systemctl restart rpitx", "r");