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Inputs
The DAPI controller has 4 S/PDIF inputs, so why not use all of them ?
The whole point of the PowerDAC is to achieve Digital to Analog conversion with minimal noise input and the
lowest possible distortion without -any- amplifiers or buffer circuits in the signal path.
We initially wanted to use all of the 4 S/PDIF inputs but by doing so we would let up-to 4 S/PDIF sources
into the DAPI controller simultaneously. Now the not used inputs that contain a live S/PDIF stream will inject
noise into the DAPI board even if this input is not selected.
The only solution to use multiple S/PDIF inputs without causing extra noise injection into the PowerDAC is to
move them outside the PowerDAC.
One possible solution is using an external input switch like the one below.
It has 4 S/PDIF inputs and includes a remote control for selecting the active input.
Digital Audio-Switch
When using the PowerDAC i.c.w. an external (pre)amplifier performance is degraded as any active device in
the audio path will degrade performance !
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