Antex Electronics DMX8 USB Mixer - Manual (Page 19)

Adjusting Levels
It is important to adjust the DMX8 USB Mixer inputs and outputs to achieve optimum
audio recording levels. The steps below describe the process that should be used for all
inputs and outputs to achieve this. The Input Levels must be adjusted before adjusting the
Recording Channel Levels or the Monitor Channel Levels.
Adjusting Input Levels:
1. Connect microphones or line sources to the DMX8 USB Mixer inputs.
2. For each input select the appropriate input type (Line, Dynamic, or Condenser)
using the Input Select buttons. If Condenser is selected and phantom power is
required by the microphone click the Phantom Power button for the input to turn
phantom power on.
3. Start with all the Input Level sliders set to 0dB.
4. For each microphone input talk loudly into the microphone at a distance of 12
inches, or for each line input provide a line level signal of nominal level. View
the front panel indicator LED for the appropriate input, and adjust the Input
Level slider such that the LED lights green constantly and occasionally turns red.
If you are unable to achieve this condition then check you have the correct input
selection for the input type being used.
Adjusting Recording Channel Levels:
The recording channel level is the signal level being converted to digital format and is
recorded by the computer.
Note: Recording Channel Levels must be adjusted after the Input Levels are adjusted.
1. Use the Recording Channel buttons to select the recording channels that each
input will be mixed to. Each input can be mixed to any of the 4 recording
channels. If you are recording 1 or 2 channels only, select recording channel 1
and/or 2 as appropriate for each input.
2. For each recording channel adjust the Recording Channel Level slider. It is
important to adjust these sliders so that an adequate signal level well above any
background noise but below the clipping threshold is obtained. To adjust the
recording channel levels:
a. Use your recording software to start a recording.
b. Start with all the Recording Channel Level sliders set to 0dB.
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