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Orpheus by CanopyLabs is a low-latency text-to-speech model hosted on SLNG infrastructure. It supports 8 English voices and built-in emotion control, letting you shape how the voice sounds without post-processing. Select a voice by passing its voice ID in your request body. Optionally set an emotion to change the delivery style. 
{
  "voice": "tara",
  "prompt": "Hello from SLNG and Orpheus.",
  "emotion": "happy"
}

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Emotion control

Orpheus supports an emotion parameter that changes the delivery style of any voice. When omitted, the voice uses its default neutral tone.
EmotionDescriptionSample
neutralDefault, balanced delivery
happyUpbeat, warm, and positive
sadSubdued, empathetic tone
angryFirm, intense delivery
surprisedExcited, astonished tone

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Voices

Voice IDNameSampleGenderAgeToneUse Case
danDanmasculineAdultFriendly, CasualTutorials, Explainer Videos, Chatbots
jessJessfeminineYoung AdultEnergetic, YouthfulSocial Content, Ads, Upbeat Narration
leahLeahfeminineAdultWarm, GentleWellness Apps, Audiobooks, Meditation
leoLeomasculineAdultAuthoritative, DeepNews, Corporate Narration, Documentaries
miaMiafeminineAdultProfessional, ArticulateE-learning, Corporate Training, Presentations
taraTarafeminineAdultConversational, ClearPodcasts, AI Assistants, Interviews
zacZacmasculineAdultEnthusiastic, DynamicSports, Gaming, Promos
zoeZoefeminineAdultCalm, SoothingRelaxation Apps, Gentle Narration