1:1 audio calls

What this covers

Vylinejs can acquire a call route, negotiate a one-to-one PLANET session, and send or receive SRTP audio. Audio input must be encoded as Opus; the library provides codec hooks and WAV/PCM helpers, but it does not capture a microphone or play sound itself.

Capability	Status	Evidence
Outgoing 1:1 audio	Implemented; live result depends on LINE account and network	example/call/call_on_command.ts
Incoming 1:1 audio	Explicit opt-in answer helper	example/call/incoming.ts
Browser audio transport	Unsupported	PLANET media requires UDP sockets

Try the outgoing example

The script listens for !call and calls the sender in a 1:1 Talk chat. It streams example/call/unity.wav unless a different WAV is passed.

LINE_AUTH_TOKEN_FILE=/path/to/auth-token.txt \
LINE_DEVICE=ANDROID \
deno run -A example/call/call_on_command.ts ./voice.wav

The example's audio path was checked against the current client API and call helpers. This is a static source check, not a claim that a live call was made during documentation review. See the call notes for signaling, media keys, and troubleshooting detail.

Incoming audio

Use answerIncoming only after applying your own admission policy. The library does not auto-answer. The provided helper requires a caller approval callback, closes the transport in finally, and supports cancellation with AbortSignal.

Limits

Account state, device identity, peer client, codec, and network affect live-call success. Review the latest call verification notes before depending on a specific device path. Keep the call transport open only for the call lifetime and always close it during cleanup.