Apogee Electronics Symphony I/O Mk II - Audio Interface : User Manual : Page 31

Input Tab Window

Settings for Symphony’s analog and digital inputs are found in the input tab."

"

1.

Analog Level

- Use this drop down menu to choose the analog level for each A/D conversion

channel.!

Option+click any channel to set the reference for all channels

Choose +4dBu when connecting to “pro” gear, such as en external mic pre,

compressor, or EQ, with outputs at a +4dBu nominal level.

Choose -10dBV when connecting to “semi-pro”, hi-fi, or musical instrument gear

with outputs at a -10 dBV nominal level.

When an optional Mic Pre module is installed, the following entries become available:

Choose Mic when connecting microphones or direct boxes, or any devices that

needs to run through a microphone preamplifier.

Choose Inst when connecting a guitar or keyboard, or any high impedance (Hi-Z)

instrument to the 1/4” input (balanced TRS or unbalance TS). The signal is sent

through a Hi-Z to Low-Z conversion circuit before sent through the microphone

preamplifier circuit.

2.

Digital Ref Level

- When Analog Level is set to +4 dBu or -10 dBV, use this pop-up menu to choose the

digital reference level for each A/D conversion channel.!

Option-select any channel to set the digital reference for all channels

3.

Soft Limit

- Select “On” to engage. This option begins to attenuate transient peaks at a threshold

of -4dBfs.

4.

Show/Hide Trims

- Click this button to display or hide all Trim faders.

5.

Reset Trims

- Click this button to reset all Trim faders.

6.

Trim Fader

- Once the desired reference levels have been chosen, click Show Trims, then use the

Trim Fader to precisely trim the A/D conversion level within +- 0.1 dB. Note that

numerical values may be entered directly in the Trim level readout. Press Tab to

advance to the adjacent Trim level readout for quickly

7.

A/D Converter

Meter

- This meter displays the level of the input after A/D conversion in the range -48 to 0

dBfs.

8.

Meter Level

Readout

- This indicator provides an accurate reading of the analog input meter to an accuracy

of 0.1 dB. The reading is used primarily to calibrate the A/D converter stage with a

steady input tone.

9.

S/PDIF Replaces

- To use the S/PDIF Coax input, itʼs necessary to select another analog or digital

channel pair which the S/PDIF Coax input will replace on the Input Routing grid. Use

this drop down menu to select the channel pair to be replaced.

SYMPHONY I/O MK II - USER’S GUIDE Page 31

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