Extended Usage Example

A full-featured example showing voice selection, playback controls, speech parameter tuning, and a live event log.

Tip

Live demo · Source code

What it covers

• Voice browser with language filtering
• speak / pause / resume / cancel controls
• Rate / pitch / volume sliders
• Platform detection (browser, OS, device type)
• Real-time event log
• Demo mode indicator driven by rv.isDemoMode()
• Force-fallback toggle (use HTTP audio instead of Web Speech API)

Speech parameter ranges

Parameter	Min	Default	Max	Description
rate	0.1	1.0	2.0	Speech speed
pitch	0.1	1.0	2.0	Voice pitch
volume	0.0	1.0	1.0	Audio volume

rv.speak('Hello!', 'UK English Female', {
  rate: 1.2,
  pitch: 1.0,
  volume: 0.8,
});

Force fallback mode

Bypass the Web Speech API and always use HTTP audio from the server:

await rv.init({ apiKey: 'your-api-key', forceFallback: true });

Useful when you need consistent audio across browsers, or when Web Speech API voices are unavailable on the target device.

Next Steps

• Basic Example — the minimal starting point
• Voice Selection Guide — advanced voice filtering
• Events Guide — full event reference