Creative 1212M, 1820M owner manual Using External Clock, Midi Settings

4 - The PatchMix DSP Mixer

The Session

The System Settings include the following:

•Internal/External Clock Selects between internal or external word 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, 88.2 kHz, 96kHz,
	176.4kHz, 192kHz.
• External Clock Source	Select from: ADAT, S/PDIF, or Word Clock (Sync card
(ext. clock only)	only) as an external sample clock source.

Using External Clock

Whenever you are using any digital I/O such as ADAT or S/PDIF, one of the digital devices MUST supply the master clock to the others. This master clock runs at the system sample rate (44.1k, 48k, 88.2k, 96k, 176.4k or 192 k) and can be distributed using a dedicated cable (word clock) or embedded into a data stream such as S/PDIF or ADAT. 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 be extinguished 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.

MIDI Settings

ENote: if set to “External” without an external clock present, PatchMix DSP defaults to the internal 48kHz clock rate.

ENote: The maximum supported sample rate for S/PDIF is 96kHz.

This option allows you to use either the MIDI In jack on the rear of the AudioDock or the Sync Card MIDI jack as a MTC Output. (The MTC Out only transmits MTC.)

• Dock MIDI 2 In	Selects the rear MIDI Input on the AudioDock as MIDI 2.
• Sync Card Enabled	Selects the Sync Card functions. This selection disables
	MIDI 2 In on the rear panel of the AudioDock. MIDI 2
	Out on the rear panel of the AudioDock duplicates MIDI
	1 Out in this mode.

EThe SMPTE Input will not function and the Sync Card control panel will not be updated when Dock MIDI 2 In is selected.

Word Clock and SMPTE Out will operate with Dock MIDI 2 selected.

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