CAN32 – AVB Audio Video Bridge Card

The CAN32 card is Type 2 hardware.

Type 2 hardware provides new cables and connectors between the I/O cards and main boards in Cores and I/O Frames. Due to this change, the Type 2 hardware is not physically compatible with the older hardware. You can still integrate the new I/O Frames and Cores in the same system with older hardware, but the I/O cards are not interchangeable. Type 2 hardware can be identified by a yellow label on the back of the Core and I/O Frame, and the bottom of the I/O cards.

Specifications

CAN32 Card
Description	AVB network audio input and output card
Maximum audio channel capacity:	0x32, 32x0 or 16x16 channels
Also configurable as	8x8, 4x4 and 2x2
Stream configurations limited by AVB, from https://abc.statusbar.com/: Network Speed: AVB BW Allocation: Stream format: Sample rate: Bits/Sample: AAF Samples/Frame:	100 baseT 90% ¹ AM824 (non-blocking) 48 kHz 24 default
Card I/O
Sample Rate	48 kHz only
SRC (Sample Rate Converter)	Between AVB and Q-SYS (always) There is an SRC on the inputs and outputs, with a delay of 2 ms each.
Configurable AVB clock	Internally generated (not related to Q-SYS clock) Recovered clock from one of the AVB input streams
Network data rate: 100 Mbps
Indicators Yellow Green	"SPEED" LED indicates connection to 100 Mbps link partner (network switch or end point) when illuminated "LINK/ACT" LED indicates network link established when illuminated solid and indicates network transmit and/or receive activity when blinking
Connectors	Two female RJ-45 connectors
1. Most switches will be set to 75% by default to allow for other traffic.)

Card I/O

Card I/O	Valid Streams / Channels
2x2	1 / 2 2 / 1
4x4	1 / 4 2 / 2 4 / 1
8x8	1 / 8 2 / 4 4 / 2 8 / 1
16x16	1 / 16 2 / 8 4 / 4 8 / 2 14 / 1
32x0 or 0x32	1 / 32 2 / 16 4 / 8 8 / 4 12 / 2

Connect an AVB Listener to an AVB Talker

AVDECC (aka 1722.1) (see https://avb.statusbar.com/article/1722.1-features/): This is what is normally done, and it involves some 3rd party software. We've been using Riedel AVB Manager, but there are others such as Pivitec's AVDECC Controller
"Directly" via "Full Stream ID": Each AVB stream on the network has a unique 64-bit stream ID (Full Stream ID). Rather than using AVDECC software that discovers what AVB devices are out on the net, if you know the Full Stream ID you can just tell your Listener to listen to that stream and bypass AVDECC (and related 3rd party software)

Configure the AVB I/O Card

The Q-SYS CAN32 AVB I/O Card is user configurable via Q-SYS Designer version 4.2.x or greater, including ability to make Direct connections via Full Stream ID (no AVDECC in Q-SYS)

Configurable via third-party software applications supporting the AVDECC control protocol as defined in IEEE 1722.1

IEEE 1722.1 AVDECC Descriptors

The Q-SYS CAN32 AVB I/O Card supports the following IEEE 1722.1 AVDECC descriptors:

ENTITY
CONFIGURATION
AUDIO_UNIT
STREAM_INPUT
STREAM_OUTPUT
JACK_INPUT
JACK_OUTPUT
AVB_INTERFACE
CLOCK_SOURCE
LOCALE
STRINGS
STREAM_PORT_INPUT
STREAM_PORT_OUTPUT
AUDIO CLUSTER
AUDIO_MAP
CLOCK_DOMAIN
EXTERNAL_PORT_INPUT
EXTERNAL_PORT_OUTPUT

IEEE 1722.1 AVDECC commands

The Q-SYS CAN32 AVB I/O Card supports the following IEEE 1722.1 AVDECC commands:

GET_NAME
SET_NAME
ACQUIRE_ENTITY
LOCK_ENTITY
START_STREAMING
STOP_STREAMING
AVDECC = Audio Video Discovery, Enumeration, Connection management and Control (aka 1722.1)

CAN32 – AVB Audio Video Bridge Card

1. Most switches will be set to 75% by default to allow for other traffic.)