Otis Caldwell
English (US) · American · male · clear · rapid · Naadly Core
Fast, upbeat social read - clear American voice, rapid pace
The facts
| Language | English (US) (en_US) |
|---|---|
| Accent | American |
| Delivery | clear, rapid |
| Measured pitch | 153.1 Hz · 5.04 words per second |
| Quality | Best · clarity grade A |
| Tier | Naadly Core — on every plan, including free |
| Licence | CC BY 4.0 (attribution required — how we credit it) |
| Engine id | en_US-libritts_r-medium:3835 |
Commercial use is included on every plan. Everything generated is watermarked and labelled as AI — the licences in full.
Voices that sound like Otis
Punchy ad read
Technical details
Engine id en_US-libritts_r-medium:986
Model en_US-libritts_r-medium · speaker
986
CC BY 4.0 (attribution required)
Pitch 123.9 Hz · 4.5 words/sec · clarity grade B
Clean explainer and demo voice
Technical details
Engine id en_US-libritts_r-medium:593
Model en_US-libritts_r-medium · speaker
593
CC BY 4.0 (attribution required)
Pitch 162.1 Hz · 4.02 words/sec · clarity grade A
Everyday narration voice
Technical details
Engine id en_US-libritts_r-medium:3307
Model en_US-libritts_r-medium · speaker
3307
CC BY 4.0 (attribution required)
Pitch 134.5 Hz · 4.8 words/sec · clarity grade A
Everyday narration voice
Technical details
Engine id en_US-libritts_r-medium:5909
Model en_US-libritts_r-medium · speaker
5909
CC BY 4.0 (attribution required)
Pitch 117.9 Hz · 4.47 words/sec · clarity grade A
Fast, upbeat social read
Technical details
Engine id en_US-libritts_r-medium:850
Model en_US-libritts_r-medium · speaker
850
CC BY 4.0 (attribution required)
Pitch 119.2 Hz · 4.97 words/sec · clarity grade A
Clean explainer and demo voice
Technical details
Engine id en_US-libritts_r-medium:1811
Model en_US-libritts_r-medium · speaker
1811
CC BY 4.0 (attribution required)
Pitch 109.7 Hz · 4.02 words/sec · clarity grade B
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