> For a complete documentation index, fetch https://docs.voximplant.ai/llms.txt

# Neural

List of available premium IBM TTS voices for the [Call.say](/api-reference/voxengine/call#say) and [VoxEngine.createTTSPlayer](/api-reference/voxengine/voxengine#createttsplayer) methods that sound more natural due to advanced synthesis technology.

## Constants

| Name                                           | Type    | Description                                           |
| ---------------------------------------------- | ------- | ----------------------------------------------------- |
|  `nl_NL_Merel`                                 | `Voice` | IBM voice, Dutch(Netherlands) female, Merel.          |
|  `en_GB_Charlotte`                             | `Voice` | IBM voice, English(United Kingdom) female, Charlotte. |
|  `en_GB_James`                                 | `Voice` | IBM voice, English(United Kingdom) female, James.     |
|  `en_GB_Kate`                                  | `Voice` | IBM voice, English(United Kingdom) female, Kate.      |
|  `en_US_Allison`                               | `Voice` | IBM voice, English(United States) female, Allison.    |
|  `en_US_Emily`                                 | `Voice` | IBM voice, English(United States) female, Emily.      |
|  `en_US_Henry`                                 | `Voice` | IBM voice, English(United States) male, Henry.        |
|  `en_US_Kevin`                                 | `Voice` | IBM voice, English(United States) male, Kevin.        |
|  `en_US_Lisa`                                  | `Voice` | IBM voice, English(United States) female, Lisa.       |
|  `en_US_Michael`                               | `Voice` | IBM voice, English(United States) male, Michael.      |
|  `en_US_Olivia`                                | `Voice` | IBM voice, English(United States) female, Olivia.     |
|  `fr_CA_Louise`                                | `Voice` | IBM voice, French(Canadian) female, Louise.           |
|  `fr_FR_Nicolas`                               | `Voice` | IBM voice, French female, Nicolas.                    |
|  `fr_FR_Renee`                                 | `Voice` | IBM voice, French female, Renee.                      |
|  `de_DE_Birgit`                                | `Voice` | IBM voice, German female, Birgit.                     |
|  `de_DE_Dieter`                                | `Voice` | IBM voice, German male, Dieter.                       |
|  `de_DE_Erika`                                 | `Voice` | IBM voice, German female, Erika.                      |
|  `it_IT_Francesca`                             | `Voice` | IBM voice, Italian female, Francesca.                 |
|  `ja_JP_Emi`                                   | `Voice` | IBM voice, Japanese female, Emi.                      |
|  `ko_KR_Jin`                                   | `Voice` | IBM voice, Korean female, Jin.                        |
|  `pt_BR_Isabela`                               | `Voice` | IBM voice, Brazilian Portuguese female, Isabela.      |
|  `es_ES_Enrique`                               | `Voice` | IBM voice, Spanish(Castilian) male, Enrique.          |
|  `es_ES_Laura`                                 | `Voice` | IBM voice, Spanish(Castilian) female, Laura.          |
|  `es_LA_Sofia`                                 | `Voice` | IBM voice, Spanish(Latin American) female, Sofia.     |
|  `es_US_Sofia`                                 | `Voice` | IBM voice, Spanish(North American) female, Sofia.     |
|  `en_AU_Heidi_Expressive`                      | `Voice` | IBM voice, English(Australian) female, Heidi.         |
|  `en_AU_Jack_Expressive`                       | `Voice` | IBM voice, English(Australian) female, Jack.          |
|  `en_US_Allison_Expressive`                    | `Voice` | IBM voice, English(United States) female, Allison.    |
|  `en_US_Emma_Expressive`                       | `Voice` | IBM voice, English(United States) female, Emma.       |
|  `en_US_Lisa_Expressive`                       | `Voice` | IBM voice, English(United States) female, Lisa.       |
|  `en_US_Michael_Expressive`                    | `Voice` | IBM voice, English(United States) female, Michael.    |
|  <code>es\_LA\_Daniela<wbr />Expressive</code> | `Voice` | IBM voice, Spanish(Latin American) female, Daniela.   |