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How about a different approach: replace Juli@'s analogue PCB

I've been toying with this idea for a while and if we could take all the innovation from Alfred, Greg and Promethk the result could be very interesting. The idea is to plug in a new PCB onto the digital section with:

  1. high quality caps providing cleaner power to Juli@'s digital section using power header pins
  2. would need to look into 3.3V clean power as per Alfred
  3. new DAC chips would be TI (Burr Brown) PCM1794A (hw control) which offers 132db SNR @ 9V output. this chip can be configured to have its internal reconstruction filter disabled (i.e. use external filter)!
  4. output stage using miniature tubes
  5. faraday cage?
  6. Neutric or Hicon XLR connectors
  7. card would use 2 PC slots
  8. DAC's 5V analogue input and 3.3V digital input is highly refined (also cater for battery supply)
  9. jumpers to set output voltage (9, 4.5 or 2=default) and ground connection


Juli@'s I2S interface is exceptionally good within a cMP² platform. The aim would be to have an analogue add-on PCB with performance rivaling "cost no object" DACs. (Of course at minimal cost including velvet packaging and white gloves).

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