User Manual

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User Manual (1.0.14) EasyVR 3 69
good, but then you may also lose a few correct results. So, in the end, you need to find the best
compromise.
Ticking “Use “Fast” SD/SV Recognition” will use a faster algorithm for SD and SV recognition.
In a similar way, faster SI recognition can be obtained by lowering the Trailing Silence (default is 400 ms).
The last parameter affects the internal microphone pre-amplifier and AGC (Automatic Gain Control) stages
and is an indication of the expected operating distance of the microphone from the speaker’s mouth.
Note: The EasyVR module is optimized for the default distance setting “Arms Length”.
Any other settings may require hardware modifications to the onboard gain resistor.
To change the recognition settings of the currently connected EasyVR device press the “Apply” button.
The window is non-modal, so you can test the effects of your changes while leaving it open.
The “Save” button makes the EasyVR Commander remember your settings and automatically apply them
to every connected device. The module itself does not store any option.
Phone Tones Generation (DTMF)
The EasyVR module is also capable of generating DTMF sounds. This feature can be tested by using the
“Dial Tones” command in the “Tools” menu.
Figure 6 – Interface for generating phone tones
The tone duration can be specified in increments of 40 ms (milliseconds). The dial tone has a fixed
duration of 3 seconds (its duration can be modified when programming the EasyVR).