I use those chips (or other ones in the same family) as variable references for ADC chips. Quite useful to be able to set an analog reference of anything between - and 4095mv in 1mv steps. I certainly wouldn't choose them for anything audio (other than for control). I'd prefer to have something with a real audio DAC. And maybe can buffer the audio itself. Something like the dsPIC33FJ128GP802 we used in the Ronin. Maybe I'll design a decent wave shield around that chip one day. It could even read the audio direct from the SD card to both free the Arduino up to do other tasks and give CD quality stereo sound 
... I'll add it to my list ...