the problem is the click on startup, same click occurs if I use aplay to play a .wav file, on the other topic 14 days ago it was stated by gadgetoid it was a hardware problem and you were looking into it. sounds like it may be an oversight in the circuit design of the phat. It sounds like you need to keep the clock running on the phat because if I generate a long silence wav file and set that playing in background, that keeps dac clock running, and then in parrallel I use espeak I do not get any clicks any more. But not really an acceptable solution as it is draining cpu resources playing the silence wave file in the background.
http://forums.pimoroni.com/t/phat-beat-click-sound-when-clicked-play/4453
removing the vu meter settings from /etc/asound.conf does not remove the click nor does it make it worse, that was not why I wanted to remover the vu meter, that was because I want to control the leds myself.