220 to 440 ROI

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...The DDC apparently passes the clock signal into the Devialet via AES, and this gives a marked improvement in the level of details Devailet can produce.

Bear in mind that with an AES connection, there is no separate clock signal; the clock is embedded in the data.  That means the source is in control of the audio sample clock and the Devialet has to extract the sample clock from the data, using an internal phase-locked loop or similar mechanism.  This is generally considered to be an inferior approach to the Devialet being in control of the audio sample clock, as it would be in the case of USB or Ethernet inputs (for example).  Whether or not it produces better sound quality is as always down to your ears and preference.