Adding trouble shooting section

AudioInI2S.md

@@ -28,8 +28,12 @@ Checkout the `examples/Basic` example folder for audio analysis.
 #define WS_PIN 39 // WS pin from the mic.
 #define DATA_PIN 5 // Data pin from the mic.
 #define CHANNEL_SELECT_PIN 40 // Pin to select the channel output from the mic.
+                              // Some Mic's have a pin that lets you choose which I2S_CHANNEL_FMT_ONLY_LEFT
+                              // or I2S_CHANNEL_FMT_ONLY_RIGHT the data is sent on. It is best to not leave
+                              // this pin floating if your mic does have this feature (Tie it to ground or
+                              // use this CHANNEL_SELECT_PIN pin).
 
-AudioInI2S mic(BCK_PIN, WS_PIN, DATA_PIN, CHANNEL_SELECT_PIN); // defaults to RIGHT channel.
+AudioInI2S mic(BCK_PIN, WS_PIN, DATA_PIN, CHANNEL_SELECT_PIN, I2S_CHANNEL_FMT_ONLY_RIGHT); // defaults to RIGHT channel.
 
 int32_t samples[SAMPLE_SIZE]; // I2S sample data is stored here
 
@@ -47,5 +51,11 @@ void loop() {
 }
 ```
 
+## Trouble Shooting
+* Samples only filled with zeros
+    * Make sure you are reading the correct left or right channel data from your mic. `I2S_CHANNEL_FMT_ONLY_LEFT` or `I2S_CHANNEL_FMT_ONLY_RIGHT`
+* Samples randomly read zeros
+    * Your MEMS Microphone might have a channel select pin which is floating and needs to be tied to ground or assigned a pin from the esp32. 
+
 ## Licensing 
 MIT Open Source - Free to use anywhere.