NEXT INPUT (6) Select next enabled input Phase inversion
PREVIOUS INPUT (5) Select previous enabled input Phase inversion
Remote control functions
4.4.2 Changing the remote control batteries
If the LED does not turn on when pressing a button of the remote, it is likely that the remote batteries need to be changed. To
replace the batteries, remove the back cover of the remote control by removing the screws (M2.5 cross-shaped type, make sure to
use appropriate screwdriver). Exchange the batteries for new ones (make sure to respect batteries polarity) and put the back cover
back in place and tighten the screws. 2 AAA batteries are required.
4.5 Advanced clocking
Many audio sources can be connected to the C1. Depending on their type, and your C1 options, different clocking scheme can be
used. Some are simply not working at all (no sound will come out of your C1, e.g. because at least one unit doesn't lock its internal
clock to the configured clock source), some others will work for some time before muting (e.g. in case more than one unit is
configured to lock to its own internal clock), some others will work fine but won't be optimal depending on your hardware (e.g.
using D1 as clock source and C1 as clock slave when equipped with SYNC_IO boards, or engaging the SRC with AES-compliant
sources), while others will bring you the joy associated to pure musical emotion.
Recommended use cases for various configurations are detailed in the following paragraphs. Even though this chapter is quite
technical, we kindly ask you to take the time to read it in order to get the best sound out of your CH system.
4.5.1 General clocking considerations
In any configuration, there must always be no more and no less than one clock master. In CH product range, the clock master is the
unit clocked on its own internal clock (parameter clock source is INTERNAL). It can be a CH product, or an external clock generator.
If more than one clock master is used, the system is no more synchronized (at some point a unit will display “CLOCKING ERR.”). If
there isn't any clock master, each unit gets synchronization from a unit that is clock slave itself. This kind of system is not stable,
and may either never output sound, or unlock after some time. If the configured clock source (e.g. SYNCHRO BNC 75 Ohm) is not
connected or has no synchronization signal, the C1 can not lock (open padlock symbol displayed) and mutes its output.
4.5.2 Without SYNC_IO board
When a C1 with no SYNC_IO board is used together with a CH D1 SACD/CD drive (or other standard S/PDIF audio sources), both
audio data and clocking goes from the source to the DAC. More precisely, clocking is embedded in the audio stream. Schematic
below shows optimal way to connect such system:
Rev 1.9 C1 User Manual 45
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