In the previous 3D Printed Doctor Who Tardis make I complained that the sound was poor quality and low volume. This was a natural outcome of pushing the little AVR ATMega128 to the limit. Really if you want to play MP3 audio then you need MP3 hardware. I tried an Adafruit module. It was great, but expensive. We don’t really want to have an SD card in there either because they are prone to knocks and corruption. What we want is a solid state MP3 player, without breaking the bank. Does such a unicorn exist? You bet!