Antelope Audio Zodiac Gold DAC - Manual (Page 12)

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8. Advanced User Tips
8.1. Source input
Input sources can be switched by the source button (10).
Only digital inputs with valid signals are available for switching. (Of the analog inputs, An2 is
permanently available and An1 is available once a jack is inserted, without the requirement for the
signal to be present.)
Example: If only signals on AES and TOSLINK1 inputs are present, they will be the only options
available when selecting the source (together with An2 as stated above).
Whenever a digital input with valid signal is selected, the display will show the selected source input
name for about one second. After that, the display reverts to show the sample rate continuously.
When a digital input source is selected and its signal is lost, the Lock light will flash and the display
will revert to show the name of the selected input (identifying the lost signal). Now, if you scroll
through the available source inputs, the lost input source will no longer be available. You must either
select a new input source, or if you re-establish the lost signal, it will be detected immediately and
appear as an input source option again.
8.2. Changing USB mode and/or Headphone amplifier impedance
There are 3 available USB operation modes:
● UF1 – USB Full Speed Mode (12Mbits) for backwards compatibility. Supports sample rates
up to 96KHz.
● UH1 – USB High Speed Mode (480Mbits). USB Audio Class 1.0. Sample rates up to
192KHz (default).
● UH2 – USB High Speed Mode (480Mbits). USB Audio Class 2.0. Sample rates up to
384KHz (MAC OSX and Linux only).
NOTE: As of Dec. 2010, the only OS that supports USB Audio Class 2.0 is Mac. For more
information, visit the support pages of www.AntelopeAudio.com.
There are 2 available Headphone amplifier impedances:
● HP1 – 120 Ω (default).
● HP2 – 0 Ω (CAUTION: boosted drive levels can damage your hearing)
Use the following procedure to change default values (FOR SAFETY, before you start, make sure
that you are not wearing headphones and that volume levels are turned down as the volume levels
can shift suddenly with the risk of damage to your ears and equipment):
● Switch to standby mode by pressing the power button (8). Display (6) will switch off to
signify standby mode.
● Press and hold the source button (10) for 2-3 seconds. The display begins to slowly switch