Owner`s manual

Recording, Microphone preamplifier, Phantom power
The USB soundcard gets the audio signals for recording from the inputs 1/2 [1], 3/4
[2] and Stereo IN [7]. Inputs 1/2 and 3/4 are mixed (1 and 3, 2 and 4) and can be
used simultaneously. The Stereo IN [7] and inputs 1/2 [1] are wired and must not be
used at the same time.
Examples of use:
- Live music recording: inputs 1 and 2 connected to 2 microphones (phantom power
supply [10] ON), inputs 3 and 4 connected to PA mixer (phantom power supply [12]
OFF).
- MLS analysis with Sample Champion measurement software (with autosync feature
enabled): input 2 connected to OUT right, input 1 connected to the microphone.
NOTE: when the phantom power supply switches are enabled or disabled, please wait
2-3 seconds to allow the charge (or discharge) of the coupling capacitors. During this
period of time the input will be not usable.
Digital input / output
The soundcard selects automatically a digital source when a digital signal is present on
the rear panel coaxial or optical inputs.
To avoid disturbs or noise while recording from analog sources, it is
recommended to set the Coaxial/Optical IN switch [17] on the right position
(Optical IN) and to use the provided cap to close the optical input connector.
NOTE: the input signal (digital or analog) is not replicated on the digital or analog
output; the soundcard cannot be used as a standalone DAC unit.
The output of the soundcard is always present on both the coaxial and digital S/PDIF
outputs, and on the analog output.
The following data formats are accepted for digital input and output. All other data
formats are unusable as S/PDIF.
- 48 kHz 16-bit Stereo
- 44.1 kHz 16-bit Stereo
- 32 kHz 16-bit Stereo
In playback, all possible data-rate sources are converted to the 16-bit stereo format at
the same source data rate.
X4 Owner's Manual - Rev. 1.4 - page 19