Audio Source Configuration

Overview

This chapter will cover defining the audio sources available for processing and encoding in R/2—one of the most critical steps in configuration after setting the IP addresses and accessing the web GUI.

R/2 is licensed by number of audio sources. Two audio sources are standard with R/2, up to eight can be licensed per unit. Each of these audio sources is available for multiple instances of processing and/or encoding. 3-band Omnia processing is standard, with optional Omnia.9 processing available.

Audio Sources

This screen will display the audio sources currently available on the system, and allow you to add new or remove existing sources. To add a new audio source, click on “Add audio source”. To remove an existing source, select it in the list, then click “Remove”. Ensure that the source is no longer in use by any encoding or processing instances before removing it.

“Add Audio source” menu

Select the type of audio source you wish to add.

Wave: Local audio card

Allows input from a local AES/EBU audio source or Livewire audio channel. Selecting this option will open the “Add Wave Audio Source” panel.

Friendly name

Since many audio source names on the system can be very similar, give this audio source a “Friendly” name that will be easier to remember when configuring processing and encoding instances (for example, Livewire 1, AES 1, Classical, Jazz, or whatever else will make it easier to identify in R/2).

Sampling rate

This is the sample rate that the streams from this audio channel will be generated at. Available options are 44.1 kHz or 48 kHz. Choose whichever sample rate best suits the streaming application.

Source device

Displays a list of available source devices on the system. There are up to 16 possible Livewire inputs available (defined via the “Livewire Driver” menu) and 8 AES inputs available.

Notes:

• Available Livewire I/O channels are mapped via the “Livewire Driver” menu.

• Audio card port “A” carries channels 01 through 08 (In 1-4) while port “B” carries channels 09 through 16 (In 5-8).

AES Breakout Cable Layout

RTP: Local port

Allows input via a unicast RTP stream on a user-defined IP port. Selecting this option will open the “Add RTP Audio Source” panel.

Friendly name

Since many audio source names on the system can be very similar, give this audio source a “Friendly” name that will be easier to remember when configuring processing and encoding instances (for example, Livewire 1, AES 1, Classical, Jazz, or whatever else will make it easier to identify in R/2).

Sampling rate

This is the sample rate that the streams from this audio channel will be generated at. Available options are 44.1 kHz or 48 kHz. Choose whichever sample rate best suits the streaming application.

RTP Port

Enter the port that will receive this RTP audio stream.

Receive Buffer Size (Packets)

Allows precise adjustment of the incoming RTP audio stream buffer for time alignment or other purposes.

Use PTP timestamp

Specifies the use of an IEEE 1588 PTP (Precision Time Protocol) timestamp for stream synchronization purposes.

Timestamp offset (ns)

Allows an offset to the incoming IEEE 1588 PTP timestamp to be specified.

RTP: Multicast

Allows input via a multicast RTP stream (including Livewire+/AES67). Selecting this option will open the “Add RTP Multicast Audio Source” panel.

Friendly name

Since many audio source names on the system can be very similar, give this audio source a “Friendly” name that will be easier to remember when configuring processing and encoding instances (for example, Livewire 1, AES 1, Classical, Jazz, or whatever else will make it easier to identify in R/2).

Sampling rate

This is the sample rate that the streams from this audio channel will be generated at. Available options are 44.1 kHz or 48 kHz. Choose whichever sample rate best suits the streaming application.

Channel number

Specifies the Livewire or other Audio over IP network channel number associated with the desired RTP multicast stream.

Browse

Displays a list of multicast channels and streams available on the network. Select a channel from this list to populate the “Channel number” field. Select “Reload channels list” to refresh this list of available channels.

Note: Both this method and the “Livewire Driver” method described later in this chapter can be used to define Livewire channels as available audio sources.

Use PTP timestamp

Specifies use of an IEEE 1588 PTP (Precision Time Protocol) timestamp for stream synchronization purposes.

Timestamp offset (ns)

Allows an offset to the incoming IEEE 1588 PTP timestamp to be specified.

Triton Digital Services

R/2 offers a direct, streamlined interface to Triton Digital Services for streaming and ad replacement. Stations can be added to R/2 via the “Triton Digital Services” screen. This screen also allows stations to be removed from R/2 or toggled on and off.

Adding a Triton Digital Services Station

Enter the Triton Digital Services login and password for the station you wish to add and click “Save”.

Click “Remove” to remove a station from the list, or “Toggle” to enable and disable a station.

Click “Main” to return to the main R/2 “Control Panel” screen, or “Audio Sources” to return to the audio source configuration.

Livewire Driver

The “Livewire Driver Configuration” screen allows for the configuration of the integrated Livewire IP Audio Driver and provides a direct mechanism for defining the Livewire channel names and numbers used by R/2. Up to 16 Livewire channels are available and correspond to the 16 Livewire channels available via the “Source Device” menu under “Add Wave Audio Source.”

Network Adapter

Select the desired network interface to be used for Livewire traffic. The IP addresses listed for these two interfaces should correspond to the ones assigned for NIC 1 and NIC 2.

Discovered channels (DST)

Displays a list of Livewire channels available on the network. This list is for reference only. Selecting channels in this list will not directly populate the channel number fields. Select “Reload channels list” to refresh this list of available channels.

Note: If no channels are displayed in this list, first verify that one of the NIC interfaces is connected to the Livewire network and properly configured. Second, attempt to restart the R/2 service (not the entire R/2 unit, just the R/2 “service” via the “Services” menu under “Options”—Refer to Chapter 14 for details)

Name

Enter a name to uniquely identify this channel on the Livewire network. It will appear on other Livewire devices as name@ZIPStreamR2 (see the above channel list for an example).

SRC (Send)

Enter a unique Livewire network channel number from 1 to 32767 that each IP audio driver channel will SEND to as a SOURCE. Enter “0” to disable sending to the Livewire network from a channel.

Note: Each device MUST use unique channel numbers when sending audio to the Livewire network. It is recommended that you develop a channel numbering scheme to ensure that every device on the network is always assigned a unique block of channel numbers. For example, the last octet of the IP address with the channel number appended is one such example. In this case, the channel numbers assigned to this particular R/2 would be 22201-22224.

DST (Receive)

This section allows R/2 to RECEIVE audio as a DESTINATION FROM the Livewire network. Using the “Discovered Channels” list, enter a valid channel number from the Livewire network to assign it to an audio driver channel. Audio from this network channel will appear on the corresponding Livewire driver channel in the “Source Device” menu under “Add Wave Audio Source”.

Click “Main” to return to the main R/2 “Control Panel” screen, or “Audio Sources” to return to the audio source configuration.