in src/main/java/com/amazonaws/lex/twilio/sample/streaming/AudioEventsSubscription.java [126:138]
public void writeAudioEvent(ByteBuffer byteBuffer) {
String eventId = "AudioInputEvent-" + eventIdGenerator.incrementAndGet();
AudioInputEvent audioInputEvent = StartConversationRequestEventStream
.audioInputEventBuilder()
.eventId(eventId)
.clientTimestampMillis(System.currentTimeMillis())
.audioChunk(SdkBytes.fromByteBuffer(byteBuffer))
.contentType(AUDIO_CONTENT_TYPE)
.build();
eventWriter.writeAudioInputEvent(audioInputEvent);
}