diff --git a/README.md b/README.md
index 0c563f8..fce603b 100644
--- a/README.md
+++ b/README.md
@@ -124,6 +124,18 @@ go into straight key mode.
 If you change from an iambic key to a straight key,
 you'll have to reset the adapter by unplugging it from the computer.
 
+### Optional: buzzer
+
+If you connect a buzzer or speaker to pin 7 on one leg,
+and ground on the other,
+the adapter will beep when you press the straight key.
+
+This will help a lot if there is a noticeable delay between when you press the key
+and when your computer starts making a local beeping sound.
+
+If you feel like no matter what you do,
+you're always getting DAH with your straight key,
+you should try this.
 
 ## Step 3: Load the code
 
diff --git a/vail-adapter.ino b/vail-adapter.ino
index 2c8a051..da3cb2a 100644
--- a/vail-adapter.ino
+++ b/vail-adapter.ino
@@ -17,7 +17,7 @@
 #  define DIT_PIN 12
 #  define DAH_PIN 11
 #  define KEY_PIN 10
-#  define PIEZO 8
+#  define PIEZO 7
 #  define LED_ON true
 #endif
 #define LED_OFF (!LED_ON)
@@ -97,6 +97,12 @@ void midiProbe() {
     keyboard = (event.byte3 > 0x3f);
     break;
   case 0x8B01: // Controller 1: set iambic speed (0-254)
+    // I am probably never going to use this,
+    // because as soon as I implement it,
+    // people are going to want a way to select mode A or B,
+    // or typeahead,
+    // or some other thing that I don't want to maintain
+    // simultaneously in both C and JavaScript
     iambicDelay = event.byte3 << 1;
     break;
   }