Still trying with this keypad door lock with sound

Try removing this bit of code

      // Every 100 block print a '.'
      count++;
      if (count == 100) {
        Serial.print(".");
        count = 0;
      }

Also be sure that "The Audio file to store on the SD card must be in the .wav format with 44100 Hz, 16-bit stereo quality."

Also, did you ever get the audio functionality working before you started implementing everything else or did you just copy paste the example code into a project in the making?
I'm telling you from experience, test 1 functionality at a time, make sure it works, then implement it, make sure it works again, move on.