Onyx and Shimmer couldn't be more different. Onyx is bold and commanding. Shimmer is soft and intimate. Choose Onyx when you need to make an impact and Shimmer when you need to create connection.
All samples use the high-quality tts-1-hd model at 1x speed.
| Characteristic | Onyx | Shimmer |
|---|---|---|
| Style | Bold | Soft |
| Description | Strong presence. Good for announcements and high-impact messaging. | Most intimate tone. Suited for personal content and quiet moments. |
| Best Use Cases |
|
|
Onyx commands attention. Shimmer creates intimacy.
The best way to make your decision is to test both voices with your actual content. Listen to the audio samples above with headphones, and consider generating test clips with your own scripts. Small differences in delivery can have significant impacts on user experience, so investing time in testing upfront will pay dividends.