No sound at all

  • Check your volume — make sure your device volume is turned up and not muted
  • Check your audio output — if using Bluetooth headphones, make sure they are connected
  • Check your internet connection — Epivo requires internet for all features, including speech recognition and AI responses
  • Restart the app — close Epivo completely and reopen it
  • Check permissions — Epivo needs microphone permission, but sound output should work without special permissions

Robotic or unnatural voice

If the tutor sounds robotic, you are likely hearing the Basic (device built-in) voice. This happens when Standard voices have not finished downloading.

  • Wait a moment — Standard voice models download in the background and activate automatically
  • Check your internet connection — the initial download requires an internet connection
  • Restart the session — after the download completes, start a new session to switch to Standard

Slow or choppy speech

  • Premium voices need a stable internet connection — if your connection is slow, speech may buffer or stutter. Try switching to a stronger Wi-Fi network.
  • Standard voices run locally — if Standard voices are choppy, your device may be under heavy load. Close other apps and try again.
  • Older devices may struggle with voice synthesis. Try restarting your device to free up resources.

Frequently asked questions

The tutor's voice changed unexpectedly. Why?
Epivo may switch from Premium to Standard (or Standard to Basic) if your internet connection drops or voice models are being updated. The switch is automatic and temporary.