Wheatstone

NOTE : SOUND4 products are compliant with AES67 standard, which is NOT compatible with Wheatstone's WheatNet-IP protocol. However Wheatstone products usually feature an AES67 compatibility layer.

See Wheatstone's AES67 Commission White Paper

- AES67 clocking on both Wheatstone and SOUND4. Devices must be synchronized to the same clock.

- Wheatstone default multicast range is 239.192.xxx.yyy. UDP port is 50100

- Wheatstone does not recognize either "SAP" or "mDNS / RTSP" advertising, and does not advertise using them.

Configuration (Impact, Pulse, First, BigVoice, PCI Express cards)

- VLAN : if no VLAN, use default AES67 profiles on SOUND4 : No 802.1 tagging. Else must change AES67 Profiles configuration

- Wheatstone devices accept 250µs packets, so the "AES67 Low Latency (Standard)" audio Profile is preferred. If using 1ms packets, the functionality has to be enabled on Wheatstone BLADE.

For Wheatstone to SOUND4

On SOUND4 receiver, you have to configure the reception by Manual setting :

- on Wheatstone source device you have to retrieve the Multicast IP address of the stream (something like 239.x.y.z). Also try to get the UDP port, it is usually 50100. These can be found in the SDP, respectively "c=IN IP4 <IP address>/<TTL>" line for the IP address and "m=audio <udp port> RTP/AVP <payload type>".

- on SOUND4 you have to select LAN Mode = "AES67 Multicast IP", and write down the IP address in the "Session" field, with UDP port if not 5004 (eg "239.193.4.68:50100")

- two new fields appear that has to be configured according to stream config : "Sample Format" (usually "L24") and "Nb Channels" (usually 2 ; if the stream has more than 2 only the first two will be used). These can be found in the SDP, in line "a=rtpmap:<payload type> <format>/<rate>/<n channels>".

You should now receive it

For SOUND4 to Wheatstone

- on SOUND4, select "AES67 Low Latency (Standard)" and choose a Multicast IP address that is free, in the Wheatstone AES67 Multicast Address Range. Default port is 5004 if not given

- Check Stream format in Advanced/AES67 Profiles for "Sample Format" (normally L24) and "Nb Channels" (normally 2)

- on Wheatstone BLADE you have to configure each AES67 device (with their IP address, which is the IP of AES67 Ethernet port on SOUND4 devices)

and each AES67 stream of interest (with their multicast IP address, port, payload type=97, and packet rate, 250µs or 1ms). These may be found in the SDP file, which can be retrieved on the SOUND4 device web server at "http://<SOUND4_AES67_IP>:8554/by-id/<stream number>", e.g. http://192.168.6.50:8554/by-id/1

Configuration (WM2)

Requires WM2 version 1.13 or later.

For Wheatstone to SOUND4

In Wheatstone's AES67 Commission White Paper, page 11 :

In these cases, we created SDP files for the WheatNet-IP streams by simply right-clicking on the desired source stream’s name in the Navigator crosspoint grid and opening a window that let us create the file.

You can use the generated SDP to set up the stream in SOUND4:

1. Paste the DSP description in "SDP stream description"
2. Activate "use SDP"
3. Activate "Channel enabled"

For SOUND4 to Wheatstone

In SOUND4 :

1. In "Destination IP or Channel", choose a Multicast IP address that is free, in the Wheatstone AES67 Multicast Address Range. Port is fixed to 5004.
2. Check "Codec/word length" is set to L24
3. Check "Samples per packet" is set to 48
4. "Payload Type" default is 96

On Wheatstone BLADE you have to configure each AES67 device (with their IP address, which is the IP of AES67 Ethernet port on SOUND4 devices)

and each AES67 stream of interest (with their multicast IP address, port, payload type=96, and packet rate, 1ms). These may be found in the SDP file, which can be retrieved on the SOUND4 device web server at "http://<SOUND4_WM2_IP>:8854/by-id/<stream number>", e.g. http://192.168.6.50:8854/by-id/1

NOTE: port 8854 can be changed in AES67/Livewire Setup → Advertising → RTSP port.

Tools

See LANAUDIO

Troubleshooting

• See LANAUDIO