That module is meant to be controlled via serial, not those button inputs, which are meant for buttons and
require 1/8 second hold-down. Read the tutorial...
I did, and that's great if you want to sit there and type stuff in. I don't, looking for a work around. transistors were my original thought, an arduino pin high thru a resistor to the base would turn it on and send the pin to ground. but that's 11 transistors.
or 1 transistor with a manual rotary switch so which ever pin was chosen on the switch would play that track when the transistor turns on. but that limits me to one track at a time.
and again.....another component.
the design of the fx in that it has a special file play naming convention is pretty cool. what would be even cooler is having the arduino replace me sitting there typing in the serial port telling it what to do.
there's bound to be a way, I simply haven't found it yet.