Q: May I connect the hiFace to the S/PDIF output of a CD player to listen to a computer though it?
A: No, it makes no sense to connect an output to another output. Anyway, some CD player are also provided with a digital input: this case it is possible
to connect the hiFace to such an input to use CD player’s internal DAC to convert digital data provided by the hiFace.
Q: May I connect two DAC’s to the same hiFace using a “Y” splitter?
A: No, because impedance matching is disrupted and the quality of S/PDIF signal is highly lowered, wasting the advantage of using the hiFace. If
strictly necessary, a special RF impedance corrected splitter which keeps the 75 Ohms matching at all terminations must be used. This case a level loss
(at least 50%) is seen, but being the hiFace output level higher than the standard, this loss doesn’t avoid the correct signal transfer to the two recipients.
Q: Which is the optimal setup for a player to use the hiFace at its best?
A: No universal setup exists for all players, setup must be judged for each player.
Q: May I use the hiFace on a Mac with Audirvana in Direct Mode?
A: No, OSX drivers are presently not compatible with this mode.
Q: May I use the hiFace on a Mac in Integer Mode?
A: No, OSX drivers are presently not compatible with this mode.
Q: Which is the best operation mode fo the hiFace connected to a Windows PC?
A: Best is Kernel Streaming, then WASAPI. Direct Sound mode, which must be used when listening to internet streaming, doesn’t ensures bit-perfect
transfers nor the preservation of the original quality of the musical signal.
Q: Can a poor USB connection or external EMI lower the sound quality?
A: If lowering sound quality means signal-to-noise ratio detriment or soundstage disruption, then the answer is: no. By its nature, USB carries data in
packets which may or may not be delivered. When a packet is lost, we hear a “hole” in music continuity. Otherwise, packets arrive in their integrity
and no sound detriment can be heard.
Q: May the quality of the power supply on the USB port affect the sound quality of the hiFace?
A: Sure it may, as it can affect the jitter level due to the noise injected in the hiFace’s on-board oscillators power supply.
Q: Does the USB cable quality affect the hiFace’s sound quality?
A: It’s is important that the USB cable is USB 2.0 compliant and that is not too long (up to 2-3m). USB cable with optimized structure may improbe
the connection, particularly in environments affected by EMI (USB cables carefully shielded) o when the USB power is very noisy (cables with
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