| Hume Octave | converts written text into spoken audio. ElevenLabs, Cartesia. |
| Hume Octave 2 | converts written text into spoken audio. ElevenLabs, Cartesia. |
| Hume EVI 3 | converts spoken audio directly into spoken audio, skipping the intermediate text step. OpenAI Realtime, Ultravox. |
| Hume EVI 4-mini | converts spoken audio directly into spoken audio, skipping the intermediate text step. OpenAI Realtime, Ultravox. |
