Stream Management - RAVENNA only

Learn how to add and manage RAVENNA and AES67 audio streams. OS 2.1 brings significant updates to stream management, making configuration easier and improving monitoring features.

It introduces Stream Failover capabilities between main and backup streams, options for monitoring stream integrity, and seamless transitions between streams when issues are detected.

Stream discovery

You must subscribe to streams before routing them to audio inputs. This is done through the Settings › Audio Sources section.

There are two methods for discovering and subscribing to streams. They are both available through the Add Stream button.

• Automatic discovery: if the HOLOPLOT Controller is part of the same real-time audio network, we can automatically discover audio streams based on mDNS and SAP announcements.

• Manual subscription: if no streams are discovered automatically, you can manually input an SDP (Stream Definition Protocol) generated by your audio device.

Supported streams payloads

HOLOPLOT Audio Modules complies with ST 2110-30 stream formats, specifically under the following specifications:

• Linear 24-bit PCM encoding (L24)

• 48 kHz sampling frequency (media clock)

We recommend using Level A for AES67 compliance among the three SMPTE Conformance Levels.

Stream management

You can un-route audio inputs mapped to a stream or unsubscribe streams using the contextual menu available in each stream. When unsubscribing to a stream, its existing routings will automatically be deleted.

Stream Failover configuration

With this feature, you can configure a HOLOPLOT system to monitor and automatically switch Audio Modules between main and backup stream sources using a pilot-tone detection or network package monitoring.

1. Click the stream's contextual menu and select Stream Settings.

2. Click Backup Stream and select the stream you want to add as a backup. Only streams with the same payload (including channel count) and that are not routed to any audio inputs can be assigned as backups.

3. Select a monitoring mode. There are two options for monitoring the stream's integrity:

   1. Pilot-tone detection: The system detects a pilot-tone to assess whether the stream is functioning properly. This requires additional configuration of the channel, pilot-tone frequency, and loudness.

   2. Network package monitoring: The controllers continuously monitor the RTP packages in the stream, and if a certain threshold of failed packages is exceeded, the stream is considered insufficient.

4. (Optional) Toggle Fallback to Analog Mode on. This functionality is available only in projects with Analog Presets and hardware that supports analog inputs.

When the system detects an issue with the main stream and switches to the backup stream, the transition is nearly seamless for the modules and audio output. The detection interval is every half-second.

Failover

The subscribed streams table provides various details regarding stream failover:

• Whether the stream has a backup stream or analog input.

• Which stream is currently active?

• Status of the main and backup streams.

Main stream with backup stream (and Analog fallback) assigned

Single streams

Test Mode

Toggle Test Mode to check the integrity of the streams without executing the failover.