I created a call definition, but UltraVox XT detects few or no calls

Problem

After creating a call definition and clicking Detect calls in this recording, UltraVox XT does not detect the calls that look like the one selected to create the call definition.

Solution

In the Call Detection screen, select the call definition and click Edit.

Try the following:

nReduce the frequency range (Freq Low - Freq High).

See Keep the frequency range as narrow as possible

nIncrease Min Amplitude. Hover the mouse over the calls and take note of the amplitude values you see. Min Amplitude should stay below those values.

If calls that are not detected show weaker signal (lower amplitude), reduce Min Amplitude by steps of for example 30 or 50, and see if this improves detection.

See Increase the Min Amplitude parameter and Get a feel of the amplitude in a call

nReduce the Min Duration value.

tip  Draw a rectangle around a few calls, then in the resulting call definitions look at the Min Duration parameter and take note of the average value. When you define the true call definition, click Edit and enter half of the average value as a Min Duration. Do not forget to delete the call definitions made before.

See Reduce Min Duration

nIncrease the Max Duration value.

See Increase Max Duration

nReduce Min Gap.

Sometimes two calls are detected as one when Min Gap is too high.

When calls have different frequency ranges, define two call definitions instead of one.

See also

nCall definitions

nBack to Troubleshooting