In
the Yamaha Set up Guide is mentioned that you turn it on. It usually
also makes sens to have it on, but this special case you can solve the
problem by turning it off. Or you upgrade your mac to the latest Dante
Virtual Soundcard.
Greets
Couple
of things should be address before trying to help... When using
the SG300 with Dante, you do not need to configure QOS or IGMP snooping
if you are only placing Dante devices on the network. The only
setting that needs to be configured is "Energy Efficient Ethernet" or
"EEE". This should be turned off.
When should you use QOS?
If you plan to have control data (i.e. CL Editor, StageMix, etc) on the
network, as well as Dante audio, then the QOS settings in the guide
should be used. This will make sure the Dante traffic is given
priority over all other traffic. If you only have Dante traffic,
you do not need to configure QOS.
When should you use IGMP Snooping?
If you have a lot of multicast traffic on the network, IGMP will make
sure that the multicast packets are only sent to devices that request
it. Without IGMP, the multicast traffic would be sent to every
port, regardless of whether or not the device is subscribed to receive
those packets. Think of it as junk mail versus a magazine
subscription.
Do I need to use multicast? It
depends... Basically, Dante uses two methods for distributing
audio. Unicast Flows and Multicast Flows. Unicast flows go
to one device, multicast flows are sent everywhere on the network
(unless IGMP is setup as described above). The default method for
audio distribution is unicast, and each unicast flow can contain up to
4-channels of audio. The alternate method, multicast flows, can have up
to 8-channels per flow. The number of flows, both unicast and
multicast, available per device varies by device and can be viewed in
Dante Controller ('Device View' -> 'Transmit' tab).
Understanding the number of available flows and how many channels can be
placed in each flow will help you decide if you need to use multicast
or unicast.
For example, our Rio3224-D has 32 flows. Doing
the math (32-channels / 4-channels per flow), we see that it takes 8
unicast flows to send all 32-channels to a single device. Routing
all 32-channels to 2 devices will use 16 flows. Routing to 3
devices will use 24-flows and routing to 4-devices uses all 32
flows. Therefore, if we need to send all 32-channels to 5 devices
or more, this cannot be done using unicast. We have to switch to
multicast instead (wishbone looking icon on the 'device view' window).
Another
example, DVS has 16 input flows and 16 output flows. If I have
DVS set to 64x64 and want to route all 64 channels to one device, this
can be done using unicast (64-channels / 4-channels per flow = 16
flows). If I need to route audio to more than one device, this must be
done using multicast flows.
Same rules will apply to the
input flows of DVS. However, at this time, Dante Controller does
not let you know how many input flows are being used. So, if you
are sending channels to DVS from multiple devices, you'll need to do the
math and figure out if you have enough input flows available.
As
for the problem you are having Justice, I have seen the red circle when
there is just Dante traffic on the network in the cases listed
below. Some of them have already been mentioned, but I've included
them anyway as this is how I typically troubleshoot the problem.
1) Sample Rate mismatch
2) Receiver and transmitter are in different IP subnets (i.e. 192.168.X.X vs 169.254.X.X.)
3) Transmitting device is out of output flows
4) Receiving device is out of input flows
5) Dante Firmware incompatibility
6) Hardware issues
Hardware
issues popped up for us in one case involving a Mac. The end user
was able to use one Mac just fine, but his other Mac would not playback
or record. Turned out that the chipset for the ethernet adapters was
not the same between the two generations of Mac's. They were both
Macbook Pro's but did not perform equally with the built-in ethernet
adapter. Once we switched him over to a thunderbolt-to-ethernet
adapter, he could record and playback without problems. Same
computer, different adapters, different results...
