diff --git a/src/internal/Esp32_i2s.c b/src/internal/Esp32_i2s.c
index a4c5acc..fb11d59 100644
--- a/src/internal/Esp32_i2s.c
+++ b/src/internal/Esp32_i2s.c
@@ -393,7 +393,9 @@ esp_err_t i2sSetSampleRate(uint8_t bus_num, uint32_t rate, uint8_t bits) {
     double denom = (double)1 / 63;
     int channel = 2;
 
-    double mclk, clkmdiv;
+//    double mclk;
+    double clkmdiv;
+
     int factor;
 
     if (bits == 8) {
@@ -413,11 +415,11 @@ esp_err_t i2sSetSampleRate(uint8_t bus_num, uint32_t rate, uint8_t bits) {
     clkmDecimals = ((clkmdiv - clkmInteger) / denom);
 
     if (bits == 8) {
-        mclk = rate* factor;
+//        mclk = rate* factor;
         bck = 60;
         bits = 16;
     } else {
-        mclk = (double)clkmInteger + (denom* clkmDecimals);
+//        mclk = (double)clkmInteger + (denom* clkmDecimals);
         bck = factor/(bits* channel);
     }
 
diff --git a/src/internal/NeoEspBitBangMethod.h b/src/internal/NeoEspBitBangMethod.h
index a398f2b..de5e3a1 100644
--- a/src/internal/NeoEspBitBangMethod.h
+++ b/src/internal/NeoEspBitBangMethod.h
@@ -121,7 +121,7 @@ public:
 		delay(1); // required
 		portMUX_TYPE updateMux = portMUX_INITIALIZER_UNLOCKED;
 
-		taskENTER_CRITICAL(&updateMux);
+        portENTER_CRITICAL(&updateMux);
 #else
         noInterrupts(); 
 #endif
@@ -129,7 +129,7 @@ public:
         T_SPEED::send_pixels(_pixels, _pixels + _sizePixels, _pin);
 		
 #if defined(ARDUINO_ARCH_ESP32)
-		taskEXIT_CRITICAL(&updateMux);
+        portEXIT_CRITICAL(&updateMux);
 #else
         interrupts();
 #endif