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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 1%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBA%3C/text%3E%3C/svg%3E)
Hello,
I am looking for a was to control the default duration of silence added to the start and end of each generated audio file in Azure Text-To-Speech
I am using Rest API.
Thanks in advance!
Best,
Bene
Hi,
SSML has elements for that. This should get you started: https://learn.microsoft.com/en-us/azure/cognitive-services/speech-service/speech-synthesis-markup?tabs=csharp#add-silence
Hello Evgenij,
thank you so much! I was not aware that I can change the default silence with SSML also, but the following ssml markup reduces the duration significantly!
<mstts:silence type="Leading" value="0"/>Hello<mstts:silence type="Tailing" value="0"/>
Best
Benedikt
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(252.8, 40%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
Hi Benedikt,
I am trying hard but I am not able to make the mstts:silence tag work for me. When I try in the Azure TTS test console, it fails with an error (https://azure.microsoft.com/en-us/services/cognitive-services/text-to-speech/#features)
e.g.
<speak version="1.0" xmlns="http://www.w3.org/2001/10/synthesis" xml:lang="en-US">
<voice name="en-US-ChristopherNeural">
<mstts:silence type="Leading" value="0"/>Hello<mstts:silence type="Tailing" value="0"/>
</voice>
</speak>
What is the secret trick? :-)
Hello Jan,
just define the namespace ("xmlns:mstts") to the wrapper element as follows. The other namespace definition "xmlns:emo" is not needed in this case, but if you you use emo tags in the future.
Best
Benedikt
<speak xmlns="http://www.w3.org/2001/10/synthesis" xmlns:mstts="http://www.w3.org/2001/mstts" xmlns:emo="http://www.w3.org/2009/10/emotionml" version="1.0" xml:lang="en-US"><voice name="en-US-ChristopherNeural">
<mstts:silence type="Leading" value="0"/>Hello<mstts:silence type="Tailing" value="0"/>
</voice></speak>