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As default, the VXpocket is set with line level inputs. This is suited for doing electrical measurements. If this is what you want to measure, you can skip this part.
This section will explain how the VXpocket input can be changed from line input to microphone input (If you are using the VX222 PCI-card, note that it features a selectable digital gain up to +18dBV, but cannot be used as a microphone input).
Note: If you are measuring very high sound pressure levels, you may use the line input as it is and can skip this part.
Note: If the PC is set to sleep mode, the microphone gain may be turned off. You can solve this by restarting the PC. This seems be a problem with the Digigram driver and may be fixed in future versions.
The VXpocket has the following input gains : 0 dB is the line gain, +30 dB to +51 dB in 3 dB steps are the microphone gains.
For a gain of 0 dB, a +10 dBu maximum input signal gives 0 dBFS.
Advanced information about the mixer levels
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