Voice Presets

Use these IDs with izwi tts --speaker, the Text to Speech page, or voice/speaker fields on /v1/audio/speech. Saved and reference voices use --saved-voice-id, reference_audio, or the Voice Studio saved voice library instead of these built-in speaker IDs.

Model Families

Family	Voice source
Qwen3 CustomVoice	Nine named built-in speakers
Kokoro-82M	54 multilingual voice IDs; requires `espeak-ng`
Voxtral TTS	20 bundled preset voices
LFM2.5 Audio	Four English regional presets
VibeVoice-1.5B	Reference voice or saved voice only; no built-in presets
Qwen3 Base	Reference voice or saved voice only
Qwen3 VoiceDesign	Prompt instructions, then optional saved voice reuse

Qwen3 CustomVoice

ID	Display name	Language	Description
`Vivian`	Vivian	Chinese	Warm and expressive female voice
`Serena`	Serena	English	Clear and professional female voice
`Ryan`	Ryan	English	Confident and friendly male voice
`Aiden`	Aiden	English	Young and energetic male voice
`Dylan`	Dylan	English	Deep and authoritative male voice
`Eric`	Eric	English	Calm and measured male voice
`Sohee`	Sohee	Korean	Gentle and melodic female voice
`Ono_anna`	Anna	Japanese	Soft and pleasant female voice
`Uncle_fu`	Uncle Fu	Chinese	Mature and wise male voice

Example:

izwi tts "Hello from Serena." \
  --model Qwen3-TTS-12Hz-0.6B-CustomVoice \
  --speaker Serena \
  --output serena.wav

Kokoro-82M

Kokoro voice IDs use a two-letter prefix:

Prefix	Language/region	Gender marker
`af`, `am`	American English	female / male
`bf`, `bm`	British English	female / male
`jf`, `jm`	Japanese	female / male
`zf`, `zm`	Mandarin Chinese	female / male
`ef`, `em`	Spanish	female / male
`ff`	French	female
`hf`, `hm`	Hindi	female / male
`if`, `im`	Italian	female / male
`pf`, `pm`	Brazilian Portuguese	female / male

Available IDs:

af_alloy, af_aoede, af_bella, af_heart, af_jessica, af_kore,
af_nicole, af_nova, af_river, af_sarah, af_sky, am_adam,
am_echo, am_eric, am_fenrir, am_liam, am_michael, am_onyx,
am_puck, am_santa, bf_alice, bf_emma, bf_isabella, bf_lily,
bm_daniel, bm_fable, bm_george, bm_lewis, ef_dora, em_alex,
em_santa, ff_siwis, hf_alpha, hf_beta, hm_omega, hm_psi,
if_sara, im_nicola, jf_alpha, jf_gongitsune, jf_nezumi,
jf_tebukuro, jm_kumo, pf_dora, pm_alex, pm_santa, zf_xiaobei,
zf_xiaoni, zf_xiaoxiao, zf_xiaoyi, zm_yunjian, zm_yunxi,
zm_yunxia, zm_yunyang

Example:

izwi tts "Hello from Bella." \
  --model Kokoro-82M \
  --speaker af_bella \
  --output kokoro-bella.wav

Voxtral TTS

ID	Voice
`casual_female`	Casual English female
`casual_male`	Casual English male
`cheerful_female`	Cheerful English female
`neutral_female`	Neutral English female
`neutral_male`	Neutral English male
`pt_male`, `pt_female`	Portuguese male/female
`nl_male`, `nl_female`	Dutch male/female
`it_male`, `it_female`	Italian male/female
`fr_male`, `fr_female`	French male/female
`es_male`, `es_female`	Spanish male/female
`de_male`, `de_female`	German male/female
`ar_male`	Arabic male
`hi_male`, `hi_female`	Hindi male/female

LFM2.5 Audio

ID	Voice
`US Female`	US female preset
`US Male`	US male preset
`UK Female`	UK female preset
`UK Male`	UK male preset

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Reference & Help

Voice Presets

Model Families

Qwen3 CustomVoice

Kokoro-82M

Voxtral TTS

LFM2.5 Audio

See Also

​Model Families

​Qwen3 CustomVoice

​Kokoro-82M

​Voxtral TTS

​LFM2.5 Audio

​See Also

Model Families

Qwen3 CustomVoice

Kokoro-82M

Voxtral TTS

LFM2.5 Audio

See Also