![]() ![]() This means that the transmitting device is correctly configured and sending audio to the receiver: Within this tab, when the transmitter is playing audio there should be a green speaker symbol which indicates the presence of audio. Within the Dante Controller, double click on the Transmitting device so that it brings up Device View and navigate to the Transmit tab. The Dante Controller offers a way of checking that audio is being sent and received from the transmitter to the receiver. Not hearing audio when the subscription status within the Dante Controller is successful can be caused by several factors. In the screenshot below, we can see that the adaptor uses the preferred USB CDC-NCM driver model ( .cdc.ncm). In the Ethernet section, you will see an entry for ‘Driver’. To see which driver model your adaptor uses, open System Information for your computer with the adaptor connected. Most 1Gbps USB Ethernet adaptors on the market today are based on the Realtek (RTL) 8153 chip, which only supports USB CDC-ECM.įaster adaptors (supporting up to 2.5Gbps) are typically based on the Realtek (RTL) 8156 chip, which uses USB CDC-NCM – so we advise that you choose an adaptor that is based on the Realtek (RTL) 8156 chip. Therefore, USB CDC-NCM adaptors are the recommended choice for use with DVS. In USB CDC-NCM, packets take a much more direct route (through kernel space once only), which is hardware-optimised – meaning the route is faster (enabling lower latency settings), and inherently more stable. In the first model, USB CDC-ECM, audio packets arriving via the Ethernet adapter have to take a fairly complex route through the computer’s logical architecture (‘kernel space’ twice, and also ‘user space’) before arriving at DVS – and the same (but reversed) route when travelling from DVS to the adaptor. There are two main USB driver standards for Ethernet support: USB CDC-ECM (Ethernet Control Model), and USB CDC-NCM (Network Control Model), which is a newer and more advanced standard. ![]() However, as some computers (such as Apple Macbooks) don’t provide built-in adaptors, an external USB Ethernet adaptor is required – the most popular type being USB-C. Generally, built-in Ethernet adaptors are recommended for use with Dante Virtual Soundcard (DVS). ![]() If the issue is still present with a direct connection, try a USB to Ethernet adapter in place of the built-in Ethernet port, which should resolve the problem. To confirm this as the issue, connect a Dante enabled hardware device directly to the computer so the switch is bypassed. This issue may also be due to the Mac’s built-in Ethernet port blocking communication from the leader clock. Your switch configuration may be different, please contact the switch manufacturer or your network admin for assistance with this configuration. This example is for a Cisco SG300 network switch. However, assuming the Mac has a Gigabit port, you should be fine. The easiest solution is to ‘Forward All’ multicast to the Mac. In effect, that disables IGMP snooping for that port. This can prevent DVS achieving PTP sync with the network, which in turn prevents reliable audio transmission. In some macOS and switch configurations, IGMP snooping can interfere with PTP traffic to the computer’s network interface. This FAQ will be updated if this situation changes. Remediation: None necessary at this time. We will continue to systematically evaluate these for exposure and take remediation action as appropriate. Our investigation continues, but Audinate products and services have no known direct exposure to this vulnerability at this point in time.īeyond Audinate’s core products and services, Audinate utilises software products & cloud services from a range of third parties across our business. Audinate has looked for and not identified the use of the Log4j library in any of our public products and services. This FAQ will be updated if this situation changes.ĭetails: There have been recent concerns regarding the widespread exploitation of a critical remote code execution vulnerability (CVE-2021-44228) affecting Apache Log4j, a Java logging framework. Summary: Audinate products and services have no known exposure to the Apache Log4j security vulnerability (CVE-2021-44228) at this time. Affected Products / Versions: None known at this time.
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