VT USA-168A/B Real Time Underwater Sound Analyzer Manual Rev. 1.5
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the possible sampling rate conversion and audio signal enhancement by Windows, which
may otherwise alter the original samples and lead to measurement inaccuracies.
1.4.3.1.1 Using ASIO Driver
Go to [Setting]>[ADC Device], and select “Sound Card ASIO” in the “Device Model” field.
Then choose “Zoom U-22 ASIO Driver” in the “Device No.” field (see figure below). This
is to configure the XLR-to-USB sound card as the sound recording device for the software.
Now, if you start the oscilloscope by pressing the red button at the upper left corner of the
screen, and then talk LOUDLY before the hydrophone, you should be able to see your
“voices” in the Oscilloscope and Spectrum Analyzer.
1.4.3.1.2 Using MME Driver
Go to [Setting]>[ADC Device], and select “Sound Card MME” in the “Device Model” field.
Then choose “Line (ZOOM U-22 Audio)” in the “Device No.” field (see figure below). This
is to configure the XLR-to-USB sound card as the sound recording device for the software.
Note that the displayed name of the sound card may vary a bit under different Windows
versions or with different USB ports.
