Audio and video ingest

Clean, stable source media is the foundation of Volo transcription, translation, assistive audio, and overflow video. Volo captures an audio device and optional video device through the Producer browser.

Signal flow

Monitor the signal at each handoff, then verify the result from a separate attendee device.

Browser ingest

Browser ingest uses media devices recognized by the Producer computer.

Audio

Provide a dedicated program feed from the venue audio system to a class-compliant USB audio interface or approved capture device.

• Prefer a direct USB connection over an unpowered hub.
• Use a clean post-mix feed with speech clearly above the noise floor.
• Avoid clipping at the console, interface, operating system, and browser stages.
• Disable operating-system processing that changes the program unexpectedly.
• Monitor the feed with headphones during rehearsal.

Volo requires an audio source before a browser stream can start. The room page identifies available devices by the names reported by the browser.

Video

Video is optional for browser ingest. Select Video stream disabled for a captions/audio-only room, or choose an available camera or capture source.

When video is enabled, a recognized video device is required before the stream can start. Verify framing, program content, and audio/video alignment from the attendee view.

Test the microphone

1. Select the intended audio source.
2. Select Test microphone.
3. Speak or play program audio during the five-second recording.
4. Listen to the replay.
5. Confirm that the level indicator responds consistently and that speech is clean.

Repeat the test after reconnecting an interface or changing operating-system audio settings.

Network preparation

• Use wired Ethernet for the originating Producer computer whenever practical.
• Avoid guest networks with captive portals or aggressive client isolation.
• Disable sleep and automatic restart behavior for the show computer.
• Confirm that the network permits the real-time media and WebSocket connections required by Volo.
• Run a full rehearsal from the actual venue network.

Exact bandwidth requirements depend on whether the room carries audio only or audio and video. Use the event’s approved network specification rather than a generic threshold.

Live safeguards

• Keep the originating room page open for browser ingest.
• Watch the audio level and packet-loss indicator.
• Keep power connected to the Producer computer and capture devices.
• Do not change input languages while live.
• Use a separate attendee device to verify captions, audio, and video throughout the session.

For the complete operating sequence, see Run a live stream.