If you have had trouble making routes in Dante Controller due to a “No more flows” error it is important to understand the concept of Dante Flows.
From the Dante Controller user guide: “Dante audio routing creates ‘flows‘. Each flow carries one or more channels of audio from a transmitting device to one or more receiving devices.”
The Dante Ultimo IC is limited to two transmit and two receive flows. So while many Studio Tech Ultimo-based products are capable of transmitting and/or receiving four channels of audio it can only receive from two unique flows and transmit to two unique flows. (At the time of this Tech Note these products are our Models 204, 205, 206, 207, 214, 215, 216, 374, 374A, 43D, 48D, 5330, 5414.)
If you need to send audio from one of these devices to more than two sources one option would be to create a multicast flow. This would allow the audio sent by the device to be received by any device on the network with an available receive flow. This comes as the cost of increased multicast bandwidth on the network.
Another option to work around this limitation is to use our Model 5422 Dante Intercom Audio Engine‘s pass thru mode. The Model 5422 is based on Audinate’s Brooklyn II solution and therefore has 32 transmit and 32 receive flows. The Model 5422 can combine audio channels to and from different sources into a single Dante flow.
The number of used and available flows on a particular device can be viewed on the Receive and Transmit tabs of the Device View in Dante Controller.