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These speech markup elements are defined in SSML and are available in VoiceXML 2.0. The following table is a summary of the current SSML elements supported in this release of the Vocalocity Voice Browser.
Important: Support is largely driven by the text-to-speech engine. Consult the documentation provided by your TTS vendor for specific information about how SSML elements are supported.
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Element |
Purpose |
Implementation Notes |
|---|---|---|
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Play an audio clip within a prompt |
Implemented as defined in SSML 1.0 The VoiceXML interpreter processes audio content so that only text is sent to the TTS engine; pre-recorded audio is played by the telephony hardware. For more information, see <audio> Element. |
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Specifies a pause in the speech output |
Implemented as defined in SSML 1.0 |
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Provides a description of a non-speech audio source in <audio>. |
Implemented as defined in SSML 1.0 |
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Specifies that the enclosed text should be spoken with emphasis |
Implemented as defined in VoiceXML 2.0 Ignored by Speechify 2.1.6. |
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Specifies a pronunciation lexicon for the prompt |
Implemented as defined in SSML 1.0 |
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Place a marker into the text or tag sequence so that it can be referenced |
Not supported |
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Define a metadata item as a name/value pair |
The following meta properties are supported: n Expires (http-equiv) n Pragma (http-equiv) n Cache-Control (http-equiv) For more information, see <meta> Element. |
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Define metadata information using a metadata schema |
This element is supported, but not used by the Vocalocity Voice Browser. |
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Identifies the enclosed text as a paragraph, containing zero or more sentences |
Implemented as defined in SSML 1.0 |
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Specifies a phonetic pronunciation for the contained text |
Implemented as defined in SSML 1.0 ph attribute is a required attribute that specifies the phoneme/phone string Speechify 2.1.6 only supports ph attribute with SPR format. See Speechify Users Guide for more information. |
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Specifies prosodic information – control of the pitch, speaking rate, and volume of the speech output – for the enclosed text |
Implemented as defined in SSML 1.0 Speechify 2.1.6 only supports volume and rate attributes. |
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Specifies the type of text construct contained within the element and helps specify the level of detail for rendering the contained text |
Implemented as defined in SSML 1.0 Most types are supported by Speechify. See the Speechify Users Guide for a complete listing. |
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Identifies the enclosed text as a sentence |
Implemented as defined in SSML 1.0 |
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Specifies replacement spoken text for the contained text |
Implemented as defined in SSML 1.0 |
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Specifies voice characteristics for the spoken text. |
Implemented as defined in SSML 1.0 Ignored by Speechify 2.1.6 |