This is a feature request to add programmatic playback volume control to the @humeai/voice-react SDK. Currently, users can only mute or unmute the audio output. The proposal is to expose controls via the useVoice hook, specifically adding a volume state (ranging 0.0-1.0) and a setVolume(level) function. This enhancement would allow developers to synchronize the EVI volume with their application's own sound controls for a more integrated user experience.