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Text to Speech

Overview

Nexmo uses text-to-speech engines to allow you to play machine generated speech to your users. This can either be done via an NCCO with the use of the talk action, or by making a PUT request to an in-progress call.

You can customize how speech is read out by using Speech Synthesis Markup Language (SSML)

Example

The following example NCCO shows a simple use case:

[
  {
    "action": "talk",
    "voiceName": "Amy",
    "text": "Thank you for calling Nexmo. Please leave your message after the tone."
  }
]

Locale

You should choose a voice that matches the language type of the text you are asking to be read, trying to read Spanish with an en-us voice for example will not produce good results. For many languages Nexmo offers a choice of voices with different styles and genders.

You can set the Voice with a Voice Name parameter in the talk command, if you do not specify a voice name then nexmo will default to Kimberly, an en-US voice.

Voice Names

Name	Language	Gender
`Salli`	`en-US`	`female`
`Joey`	`en-US`	`male`
`Naja`	`da-DK`	`female`
`Mads`	`da-DK`	`male`
`Marlene`	`de-DE`	`female`
`Hans`	`de-DE`	`male`
`Nicole`	`en-AU`	`female`
`Russell`	`en-AU`	`male`
`Amy`	`en-GB`	`female`
`Brian`	`en-GB`	`male`
`Emma`	`en-GB`	`female`
`Geraint`	`en-GB-WLS`	`male`
`Gwyneth`	`cy-GB`	`female`
`Raveena`	`en-IN`	`female`
`Ivy`	`en-US`	`female`
`Matthew`	`en-US`	`male`
`Justin`	`en-US`	`male`
`Kendra`	`en-US`	`female`
`Kimberly`	`en-US`	`female`
`Joanna`	`en-US`	`female`
`Conchita`	`es-ES`	`female`
`Enrique`	`es-ES`	`male`
`Penelope`	`es-US`	`female`
`Miguel`	`es-US`	`male`
`Chantal`	`fr-CA`	`female`
`Celine`	`fr-FR`	`female`
`Mathieu`	`fr-FR`	`male`
`Aditi`	`hi-IN`	`female`
`Dora`	`is-IS`	`female`
`Karl`	`is-IS`	`male`
`Carla`	`it-IT`	`female`
`Giorgio`	`it-IT`	`male`
`Liv`	`nb-NO`	`female`
`Lotte`	`nl-NL`	`female`
`Ruben`	`nl-NL`	`male`
`Jacek`	`pl-PL`	`male`
`Ewa`	`pl-PL`	`female`
`Jan`	`pl-PL`	`male`
`Maja`	`pl-PL`	`female`
`Vitoria`	`pt-BR`	`female`
`Ricardo`	`pt-BR`	`male`
`Cristiano`	`pt-PT`	`male`
`Ines`	`pt-PT`	`female`
`Carmen`	`ro-RO`	`female`
`Maxim`	`ru-RU`	`male`
`Tatyana`	`ru-RU`	`female`
`Astrid`	`sv-SE`	`female`
`Filiz`	`tr-TR`	`female`
`Mizuki`	`ja-JP`	`female`
`Seoyeon`	`ko-KR`	`female`
`Zeina`	`ar`	`Female`
`Zhiyu`	`cmn-CN`	`Female`
`Lea`	`fr-FR`	`Female`
`Vicki`	`de-DE`	`Female`
`Bianca`	`it-IT`	`Female`
`Takumi`	`ja-JP`	`Male`
`Mia`	`es-MX`	`Female`
`Lucia`	`es-ES`	`Female`
`Laila`	`ara-XWW`	`female`
`Maged`	`ara-XWW`	`male`
`Tarik`	`ara-XWW`	`male`
`Damayanti`	`ind-IDN`	`female`
`Miren`	`baq-ESP`	`female`
`Sin-Ji`	`yue-CHN`	`female`
`Jordi`	`cat-ESP`	`male`
`Montserrat`	`cat-ESP`	`female`
`Iveta`	`ces-CZE`	`female`
`Zuzana`	`ces-CZE`	`female`
`Tessa`	`eng-ZAF`	`female`
`Satu`	`fin-FIN`	`female`
`Melina`	`ell-GRC`	`female`
`Nikos`	`ell-GRC`	`male`
`Carmit`	`heb-ISR`	`female`
`Lekha`	`hin-IND`	`female`
`Mariska`	`hun-HUN`	`female`
`Sora`	`kor-KOR`	`female`
`Tian-Tian`	`cmn-CHN`	`female`
`Mei-Jia`	`cmn-TWN`	`female`
`Nora`	`nor-NOR`	`female`
`Henrik`	`nor-NOR`	`male`
`Luciana`	`por-BRA`	`female`
`Felipe`	`por-BRA`	`male`
`Catarina`	`por-PRT`	`female`
`Joana`	`por-PRT`	`female`
`Ioana`	`ron-ROU`	`female`
`Laura`	`slk-SVK`	`female`
`Alva`	`swe-SWE`	`female`
`Oskar`	`swe-SWE`	`male`
`Kanya`	`tha-THA`	`female`
`Cem`	`tur-TUR`	`male`
`Yelda`	`tur-TUR`	`female`
`Empar`	`spa-ESP`	`female`

Discontinued voices

Some voices have been removed. The table below shows the discontinued voice names and which voice you will now get if you use the discontinued voice name.

Name	Locale	Gender	Now redirects to
`Chipmunk`	`en-US`	`male`	`Justin`
`Eric`	`en-US`	`male`	`Justin`
`Jennifer`	`en-US`	`female`	`Kimberly`
`Agnieszka`	`pl-PL`	`female`	`Ewa`