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The <Suppression> noun is used inside <Start> and <Stop> verbs to control noise suppression on the call to improve audio quality.

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Attributes

ATTRIBUTEDESCRIPTIONOPTIONSDEFAULT
direction Specifies which side of the audio shall be denoised. inbound, outbound, bothinbound
noiseSuppressionEngine The noise suppression engine to use. Defaults to Denoiser. Denoiser, DeepFilterNet, Krisp, AiCoustics-
model The Krisp model to use. Only applicable when noiseSuppressionEngine is Krisp. Available models: krisp-viva-tel-v2.kef, krisp-viva-tel-lite-v1.kef, krisp-viva-pro-v1.kef, krisp-viva-ss-v1.kef. -
suppressionLevel Suppression intensity (0.0–100.0). Only applicable when noiseSuppressionEngine is Krisp. -
family The AiCoustics model family. Only applicable when noiseSuppressionEngine is AiCoustics. Valid values: sparrow (default), quail. -
size The AiCoustics model size. Only applicable when noiseSuppressionEngine is AiCoustics. Valid values: s (default), l, vf (vf requires family to be quail). CCA-supported size aliases are also accepted and normalized. -
enhancementLevel Enhancement intensity (0.0–1.0). Only applicable when noiseSuppressionEngine is AiCoustics. Defaults to 0.8. -

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Examples

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Start suppression with default settings

<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Start>
    <Suppression direction="both" />
  </Start>
</Response>

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Start suppression with Krisp engine

<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Start>
    <Suppression
      direction="inbound"
      noiseSuppressionEngine="Krisp"
      model="krisp-viva-tel-v2.kef"
      suppressionLevel="75" />
  </Start>
</Response>

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Stop suppression

<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Stop>
    <Suppression />
  </Stop>
</Response>