TC Electronic Impact Twin - Manual (Page 19)

Versions
This section provides information on the versions of the
Control Panel software and the FireWire driver.
Check for Software Updates
• If the computer is connected to the Internet, you may
check for updates by pressing “Check Now”. You will
be directed to the Impact Twin product page at www.
tcelectronic.com.
• Press “Click here to download the latest version” and
download the full installer.
• Run the installer.
INTERNAL LOCK
Indicates that the system is locked to the Impact Twin
unit set as clock master.
EXTERNAL LOCK
Indicates that the system is locked to an external
digital device connected to the Impact Twin set as
clock master.
NO REFERENCE
External sync on the Impact Twin set as master
is unobtainable. Check connections and external
device.
AUTO COAST, NO REFERENCE
External reference sync is lost. This may happen
if e.g. the reference device has been shut down or
when a cable has been removed.
In this situation, the Impact Twin will “auto coast” and
immediately shift to the latest received valid clock.
AUTO COAST, BAD REFERENCE
This message appears when receiving a bad
reference sync source. This would occur if the
external device delivers an invalid reference clock
outside the acceptable range of (+/- 1.5%), or
after Impact Twin has been in AUTO COAST, NO
REFERENCE mode and a new invalid reference
clock is received. In this situation, Impact Twin
will “auto coast” and immediately shift to the latest
received valid clock rate.
AUTO INTERNAL, NO REFERENCE
This message appears when a valid external
reference sync source has not been found. Maybe
the reference device has not been turned on or a
cable has been removed.
In this situation, Impact Twin will go to “auto internal”
and use the internal clock (as this is the best solution
under the given circumstances).
SYSTEM SETTINGS
35
“Peter’s Impact Twin” (as it is the physical Impact
Twin unit that will determine the clock master).
• “Sync Source” is set to “ADAT” (as this is the bus on
the Clock Master unit that you would like to sync to).
Example 2: Impact Twin Jitter Rejection
•
In this setup, we have a CD player.
In terms of clock rate, a CD player cannot be controlled
externally. Accordingly, it has to be the clock master.
Thanks to the DICE II Fire Wire chip with integrated
JetPLL jitter rejection technology, Impact Twin provides
a very high quality clock. In addition, the excellent
jitter-rejection facilities will clean up the digital signal
coming from an external source.
• The CD player is connected to “My Impact Twin” via
TOS.
• On the TC NEAR Control Panel’s “System Settings”
page, “Impact Twin” is selected as Clock Master and
“Sync Source” is set to “TOS”.
• The digital reverb R4000 is connected to the other
Impact Twin in the setup (“Peter’s Impact Twin”), and
its sync parameter is set to slave to “External”.
Sample Rate
If Sync Source is set to “Internal”, the options are:
– 44.1 kHz
– 48 kHz
– 88.2 kHz*
– 96 kHz*
– 176.4 kHz**
– 192 kHz**
The following restrictions apply:
44.1 48 88.1 96 176,2 192
Reverb YES YES NO NO NO NO
ADAT channels
available
8 8 4 4 NO NO
Mixer YES YES YES YES NO NO
Tuner YES YES YES YES NO NO
S/PDIF or TOS 2 2 2 2 1 1
The DAW always controls the Sample Rate.
The sample rate is always set by your host
application (e.g. Ableton Live). If you e.g. play a
44.1 kHz project, the sample rate automatically shifts
to 44.1 kHz. If you later load and play a 48 kHz song,
the sample rate shifts to 48 kHz.
Though Impact Twin receives information about the
sample rate, it still provides the actual digital clock.
Lock Status
The TC Near Control Panel may display one of the
following lock status messages:
SYSTEM SETTINGS
34
AUTO INTERNAL, BAD REFERENCE
This message appears when a valid reference
sync is never received. This situation occurs when
the reference device only has delivered an invalid
reference clock outside the acceptable range (+/-
1.5%), or when the unit was in AUTO INTERNAL or
NO REFERENCE mode and a new invalid reference
clock source has been attached.
In this situation, Impact Twin will go to “auto internal”
and use the internal clock as this is the best solution
under the given circumstances.