Creative 1820, 1212M Front Panel Connections, Preamp Section, Midi 1 In/Out, Pdif Optical Out

3 - PCI Card & Interfaces

The AudioDock

Front Panel Connections

Insert 1/4"		Signal/Clip		Phantom		S/PDIF			LED
Plug for Line Level
		Indicators		Power On/Off		Optical Out		Indicators
-10dB to +25dB Gain
A Line	Mic	B Line	Mic		48V	MIDI		CLOCK		SMPTE
		Clip		Clip		1	LCK	44.1	96	IN
		-12 dB		-12 dB		2	EXT	48	192	OUT
						MIDI 1

							S/PDIF
Line -	-10 dB	+25 dB	-10 dB	+25 dB	In	Out	Out
Mic -	+20 dB	+55 dB	+20 dB	+55 dB

Insert XLR Plug	Input Gain	MIDI #1	Headphone	Headphone
for Mic Level
	Controls	I/O Jacks	Output	Volume
+20dB to +55dB Gain

Preamp Section

The front panel mono Mic/Line inputs A & B can be used as balanced microphone inputs, hi-Z guitar pickup inputs, or line level inputs. The Neutrik combination jack accepts microphones using a standard XLR connector or line level/hi-Z inputs using a 1/4 inch TRS/TS connector.

The superb-sounding mic preamps are designed by TF Pro®. Each preamp has a level control which sets the preamp gain from +20dB to +55dB for the XLR input and from -10dB to +25dB for the line input. The line markings around the knobs are calibrated in 10dB increments. The heavy hash marks on the gain controls indicate unity analog gain to the converter inputs (~5dBV input = 0dBFS output).

A phantom power switch enables +48 volt phantom power supplied to both micro- phones. A red LED illuminates to indicate phantom power is enabled. See Phantom Power for additional information.

Each microphone input has its own input level and clipping indicators. The green LED indicates presence of signal and illuminates at -12 dB below clipping. The red LED indicates that the signal is clipping the input. These LEDs monitor the signal directly at the analog-to-digital converters and before any processing by the rest of the system. When setting the levels for signals being sent into the AudioDock, the red level indicators should never flash.

MIDI 1 In/Out

MIDI input and output ports allow you to interface any type of MIDI equipment such as keyboards, effect units, drum or guitar controllers. The MIDI drivers were installed when you installed your PatchMix DSP software and the MIDI ports will appear in your system control panel under “Sounds and Audio Devices”.

Warning: Some microphones cannot tolerate phantom power and may be damaged. Check the microphone’s specifications and requirements before using phantom power.

Warning #2: After turning phantom power off, wait two full minutes before recording to allow the DC bias to drain.

The audio mutes for a second when phantom power is turned on.

S/PDIF Optical Out

The front panel S/PDIF connector is an optical TOSLINK output which, by default, carries a digital copy of the main output pair. This output is a convenient way to master to a portable DAT, MD recorder or other media. This S/PDIF output can also be freely assigned in the mixer application.

Headphone Output & Volume Control

The headphone output drives standard stereo headphones and the adjacent volume control sets the listening level. The headphone amplifier can drive headphones with impedance as low as 24 ohms. The headphone output uses a high-current version of the high-quality output amplifiers used on the other channels. For this reason it has a very clean signal that can be used as another stereo output if you need it. This output is freely assignable in the mixer application.

fTip: Since the headphone output can be placed into any insert location, you can use it to monitor or troubleshoot the signal flow.

20 Creative Professional