DIGITAL_IN boards back panel layout
3.3.3.1 Standard digital inputs
Each DIGITAL_IN board provides three standard digital inputs: AES-EBU (carrying consumer encoding), Coaxial (S/PDIF) and
Optical (TOSLINK). Audio format supported are 16 or 24 bits, 44.1, 48, 88.2, 96, 176.4, 192 kHz sampling frequency.
3.3.3.2 CH Link digital audio interface
Each DIGITAL_IN board includes a CH Link proprietary digital audio interface. This interface carries both complete audio stream
and control information. Use this link as the preferred interface when connecting your C1 to CH sources such as D1 SACD/CD unit.
The proprietary CH Link digital audio interface allows for high definition uncompressed digital audio transfer and supports both
DSD and PCM (up to 705.6 / 768 kHz). For digital content protection reasons, the native DSD stream is cyphered on the CH Link
interface. Of course, all CH sources (such as D1) and receivers (such as C1) use the same encoding/decoding key.
3.3.4 USB_IN boards
Optional USB_IN board provides connectivity to a USB port of a computer. Audio is sent from the computer to the C1 at a rate that
is synchronous to the C1's precision internal Masterclock. Following drawing shows the layout of the USB_IN board connector:
USB_IN boards back panel layout
Apple MAC OS X Snow Leopard V10.6.4 or above natively supports USB Audio Class 2.0, allowing 24bits/192kHz files playback.
22 C1 User Manual Rev 1.9
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