diff --git a/main/espd.c b/main/espd.c
index 37d9880..d0a818c 100644
--- a/main/espd.c
+++ b/main/espd.c
@@ -177,17 +177,17 @@ static void initdacs( void)
         get_i2s_pins(I2S_NUM_0, (board_i2s_pin_t *)(&i2s_pin_cfg));
 #else /* PD_LYRAT */
         i2s_pin_config_t i2s_pin_cfg = {
-#if 1       /* generic board 1 - edit this as needed */
+#if 0       /* generic board 1 - edit this as needed */
         .bck_io_num = 13,         /* bit clock */
         .ws_io_num = 33,          /* Word select, aka left right clock */
         .data_out_num = 32,       /* Data out from ESP32, to DIN on 38357A */
         .data_in_num = 35         /* data from ADC */
 #endif
-#if 0   /* complex arts sensorboard */
+#if 1   /* complex arts sensorboard */
         .bck_io_num = 33,         /* bit clock */
         .ws_io_num = 25,          /* Word select, aka left right clock */
         .data_out_num = 32,       /* Data out from ESP32, to DIN on 38357A */
-        .data_in_num = I2S_PIN_NO_CHANGE  /* no ADC */
+        .data_in_num = 26         /* ADC */
 #endif
         };
 #endif /* PD_LYRAT */
diff --git a/main/espd.h b/main/espd.h
index 38b34bb..d09c323 100644
--- a/main/espd.h
+++ b/main/espd.h
@@ -3,7 +3,7 @@
 #define PD_USE_CONSOLE          /* messages to Pd over "console" (USB serial) */
 /* #define PD_INCLUDEPATCH */   /* load the patch defined in "testpatch.c" */
 /* #define PD_LYRAT */          /* using LyraT or LyraT mini board */
- #define USEADC                 /* enable audio input (output always enabled) */
+#define USEADC                  /* enable audio input (output always enabled) */
 #define IOCHANS 2
 #define OBSOLETEAPI 0
 
@@ -42,3 +42,10 @@ void net_sendudp(void *msg, int len, int port); /* send whatev */
 void net_sendtcp(void *msg, int len);
 extern char wifi_ipaddr[];
 #endif
+
+#ifndef PIN_BIT_CLOCK       /* fallback pin locations for I2S audio I/O */
+#define PIN_BIT_CLOCK 13    /* bit clock */
+#define PIN_WORD_SELECT 33  /* word select */
+#define PIN_DATA_OUT 32     /* data out from ESP32 to DAC */
+#define PIN_DATA_IN 35      /* data in from ADC to ESP32 */
+#endif /* PIN_BIT_CLOCK */