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Specifications
Basic digital input compatibility
Standard digital inputs
Each DIGITAL-IN HD 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.
CH Link HD digital audio interface
Each DIGITAL-IN HD board includes a CH Link HD proprietary digital audio interface. This interface carries both
complete audio stream and control information. Use this link as the preferred interface when connecting your
C1.2 to CH sources such as the D1.5/D1 SACD/CD unit.
The proprietary CH Link HD 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 HD interface. Of course, all CH sources (such as D1.5) and receivers (such as
C1.2) use the same encoding/decoding key.
ETHERNET-IN HD Board
The optional ETHERNET-IN HD board allows connection of the C1.2 to a LAN (local area network).
If this LAN has internet access, it is possible to stream directly from your Tidal or Qobuz account, using the CH
Control Android app.
If you have a UPnP/DLNA server connected to your network (like minimserver running on a NAS), you can play
your audio files directly to the C1.2. A UPnP controller (like the CH Control Android app or any third-party iOS
and Android UPnP/DLNA controller app) acts as a front end to browse your music library and build playlists.
If a Roon server is connected to your network, select the
Roon Ready input of the C1.2 and select the CH C1.2 as
the audio output device in Roon’s control software.
USB-IN board
The optional USB-IN board provides connectivity to a USB port on a computer. Audio is sent from the computer
to the C1.2 at a rate that is synchronous to the C1.2’s precision internal Masterclock.
All recent Apple, Windows and Linux computers, including audio file players now natively support USB Audio
Class 2.0, allowing 24bit/384kHz files playback.
DSD files need USB Audio Class 2.0 to be active and they are packed into a 24bit/176.4kHz (for DSD64;
352.8kHz for DSD128) PCM carrier signal for bitstreaming. The C1.2 supports the DSD over PCM (DoP1.0) format,
automatically unpacks it and converts the DSD bitstream without any loss.
C1.2 User Manual
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