I'm using Raspberry Pi Zero with Volumio for audio streaming from NAS and Spotify. As of now I have simply connected it to the HDMI port of my AVR. The sound is pretty good. I was wondering how much difference does a DAC like Hifiberry DAC+ Zero or Allo Miniboss I2S DAC make to the sound quality. Is it worth buying? Are these, or any similar products, available in India? I saw a few on Robu.in, but none of them were compatible with the Pi Zero.