diff --git a/README.md b/README.md
index c9d34e1..50ca4e0 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ pip install -U platformio
 platformio run -t upload && platformio device monitor -b 115200
 ```
 
-* Convert mp3 files: `sox ~/Music/input.mp3 -c 1 -r 11025 output.wav trim 0 30`
+* Convert mp3 files: `sox ~/Music/input.mp3 -c 1 -r 11025 -b 16 output.wav trim 0 30`
 * SD card is tested with one FAT16 partion
 
 ## ToDo
diff --git a/src/keyboard.cpp b/src/keyboard.cpp
index c979099..7e5348e 100644
--- a/src/keyboard.cpp
+++ b/src/keyboard.cpp
@@ -37,6 +37,8 @@ static void tp_example_rtc_intr(void *arg) {
 }
 
 bool Keyboard::getTouchDetected(uint8_t pad) {
+  if (pad==8) pad=9;  // fix hardware wiring
+  if (pad==1) pad=8;
   bool res = s_pad_activated[pad];
   s_pad_activated[pad] = false;
   return res;
diff --git a/src/main.cpp b/src/main.cpp
index c0c21b5..96c0175 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -54,7 +54,8 @@ void loop()
   for(int i=0; i<=9; i++) {
     if (keyboard.getTouchDetected(i) == true) {
       touched = true;
-        Serial.println("touch");
+        Serial.print("touch ");
+        Serial.println(i, DEC);
       if (sound.playing == false) {
         Serial.println("new task");
         xTaskCreate(&(Sound::buffer_refill_task), "buffer_refill_task", 4096, (void*)soundFile[i/3][i%3], 5, &xTaskSound);