Alloy and Echo represent two distinct philosophies in voice selection. Alloy adapts to any context without imposing personality, making it ideal for utility applications. Echo brings gravitas and depth that commands attention, perfect for content that needs weight and authority. Your choice depends on whether you want the voice to blend in or stand out.
All samples use the high-quality tts-1-hd model at 1x speed.
| Characteristic | Alloy | Echo |
|---|---|---|
| Style | Neutral | Deep |
| Description | Balanced default voice. Works across most use cases without drawing attention. | Low and authoritative. Natural fit for narration and documentary content. |
| Best Use Cases |
|
|
Use Alloy for everyday content. Echo brings gravity and depth suited for narration.
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.