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4 - The PatchMix DSP Mixer
The Session
16 Creative Professional
Session Settings
System Settings
Pressing the Session Settings button on the toolbar brings up the System Settings
window shown below. Click the tabs to select System or I/O options.
The System Settings include the following choices:
E Note: if set to
“External” without an
external clock present,
PatchMix DSP defaults to
the internal 48kHz clock
rate.
Using External Clock
Whenever you are connecting two or more devices using digital I/O such as S/PDIF, one
of the digital devices MUST supply the master clock to the others. This master clock runs
at the system sample rate and can be distributed using a dedicated cable (word clock) or
embedded into a data stream such as S/PDIF. Common symptoms of unsynced
digital audio include, random clicks or pops in the audio or failure of the digital stream
to be recognized. Always check for the presence of the “LOCKED” indicator
whenever you are using a digital interface.
If an External Clock is interrupted or switched after the Session has been created (except
between 44.1k <-> 48k), the “LOCKED” indicator will extinguish and PatchMix will
attempt to receive the external data. The two units are NOT sample locked however, and
you should correct this condition to avoid intermittent clicks in the audio.
• Internal/External Clock Selects between internal or external clock source as the
master clock source for the system
• Sample Rate Selects the sample rate when using internal clock.
Your choices are: 44.1kHz, 48kHz, 88.2kHz, 96kHz,
176.4kHz, 192kHz
• External Clock Source
(ext. clock only)
Select from S/PDIF or the Word Clock (Sync card only) as
an external sample clock source.