Making Facility-Wide Network Audio Work

Presenters : Matt Ward - Jigsaw

Year : 2019

dlp_document_download : AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 1 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 C U R A T E D B Y The 7 th Circle Of Hell Making Whole -Facility Network Audio Work Matt Ward, Head Of Audio Jigsaw 24 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 2 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 2 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 3 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 4 Whole Facility ? • Multiple Rooms 20 • Shared Resources • Streaming audio between them • May need to integrate with Video Devices 4 Network Audio ( AoIP ) Audio Transport over IP. Production Capable Built on standard technologies AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 3 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 5 Transport Over IP QLAN Livewire Ravenna Dante ?AES67? CobraNet AES50 / SuperMac Soundgrid Riedel Rocknet Aviom Pro64 AVB Production Capable Linear | PCM | Uncompressed Minnimum Sampling Frequency 44.1kHz Minnimum Bit Depth 16 bits "Low" Latency <10mS Built on Standard Technologies RTP (RTCP RTSP) media transport SIP (Session Initiation Protocol) SDP (Session Description Protocol) PTP synchronisation Bonjour / SAP Etc … I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 6 Why Bother? AoIP Advantages • Bi directional • Many channels on a single cable • Audio routing at the IP layer • Commodity Hardware • Consolidated Clocking Architecture • Automated Device Discovery • CHEAPER • MORE FLEXIBLE • EFFICIENT "To the ‘disinterested observer’, an ideal network audio system and an ideal conventional audio system should be identical." AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 4 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 7 Why Bother? AoIP Disadvantages • Audio engineers are not network engineers • Complexity of setup? • Fear of change • Timing / Clocking? Any sufficiently advanced technology is indistinguishable from magic I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Making Network Audio Work 1. Easy Wins 2. Clocking 3. Network Considerations AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 5 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Easy Wins Name your paths and devices Logically Group devices by IP address Simplify routing options Redundancy? Static Reservation DHCP Don’t just think about logical networking, consider the physical realities Cable Performance I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 10 Cable ID: 74022 Test Summary: PASS Date / Time: 19/07/2017 12:54:02 Operator: WES CYRUS Model: DTX-1800 Headroom 3.3 dB (NEXT 36-45) Software Version: 2.7700 Main S/N: 9480027 Test Limit: TIA Cat 6A Perm. Link Limits Version: 1.9400 Remote S/N: 9480028 Cable Type: * ULTIMA CAT6A U/FTP * Calibration Date: Main Adapter: DTX-PLA002 NVP: 74.0% Main (Tester): 21/04/2016 Remote Adapter: DTX-PLA002 Remote (Tester): 21/04/2016 Project: DTDC VIRTUS Site: VIRTUS DC Untitled1 Length (m), Limit 90.0 [Pair 36] 6.0 Prop. Delay (ns), Limit 498 [Pair 12] 28 Delay Skew (ns), Limit 44 [Pair 12] 1 Resistance (ohms) [Pair 12] 1.3 Insertion Loss Margin (dB) [Pair 36] 39.2 Frequency (MHz) [Pair 36] 490.0 Limit (dB) [Pair 36] 43.2 Worst Case Margin Worst Case Value PASS MAIN SR MAIN SR Worst Pair 36-45 36-45 36-45 36-45 NEXT (dB) 3.3 4.0 3.3 4.0 Freq. (MHz) 492.0 491.0 492.0 491.0 Limit (dB) 26.9 26.9 26.9 26.9 Worst Pair 36 36 36 36 PS NEXT (dB) 3.9 4.4 3.9 4.4 Freq. (MHz) 492.0 492.0 492.0 492.0 Limit (dB) 24.0 24.0 24.0 24.0 PASS MAIN SR MAIN SR Worst Pair 12-45 45-12 12-45 45-12 ACR-F (dB) 15.0 15.1 15.3 15.5 Freq. (MHz) 366.0 368.0 496.0 496.0 Limit (dB) 12.9 12.9 10.3 10.3 Worst Pair 45 45 45 45 PS ACR-F (dB) 15.8 15.9 16.3 17.1 Freq. (MHz) 1.0 1.0 496.0 497.0 Limit (dB) 61.2 61.2 7.3 7.3 N/A MAIN SR MAIN SR Worst Pair 12-45 12-45 36-45 36-45 ACR-N (dB) 24.1 23.3 42.9 43.5 Freq. (MHz) 15.4 19.0 492.0 491.0 Limit (dB) 48.0 45.8 -16.5 -16.4 Worst Pair 12 12 36 36 PS ACR-N (dB) 23.4 23.0 43.3 43.8 Freq. (MHz) 17.4 18.1 492.0 492.0 Limit (dB) 44.4 43.9 -19.3 -19.3 PASS MAIN SR MAIN SR Worst Pair 12 12 12 12 RL (dB) 4.3 4.4 4.3 4.4 Freq. (MHz) 500.0 483.0 500.0 483.0 Limit (dB) 8.0 8.0 8.0 8.0 Compliant Network Standards:10BASE-T 100BASE-TX 100BASE-T4 1000BASE-T 10GBASE-T ATM-25 ATM-51 ATM-155 100VG-AnyLan TR-4 TR-16 Active TR-16 Passive 6.0 m Wire Map (T568B)PASS Insertion Loss (dB) MHz 0 10 20 30 40 50 60 0 250 500 NEXT (dB) MHz 0 20 40 60 80 100 0 250 500 NEXT @ Remote (dB) MHz 0 20 40 60 80 100 0 250 500 ACR-F (dB) MHz 0 20 40 60 80 100 0 250 500 ACR-F @ Remote (dB) MHz 0 20 40 60 80 100 0 250 500 ACR-N (dB) MHz -40 0 40 80 0 250 500 ACR-N @ Remote (dB) MHz -40 0 40 80 0 250 500 RL (dB) MHz 0 10 20 30 40 50 60 0 250 500 RL @ Remote (dB) MHz 0 10 20 30 40 50 60 0 250 500 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 6 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Clocking Review Best Master Clock Algorithm I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Clocking Review Best Master Clock Algorithm Is there a flaw? AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 7 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Clocking Review Best Master Clock Algorithm Is there a Flaw Ptp is a time protocol Not a timing protocol I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Networking Considerations 14 AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 8 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Network Segregation and QoS It is not required to keep network traffic segregated. - When appropriate - How can we segregate If not segregated QoS is essential for performance. I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Spanning Tree Protocol " The Spanning Tree Protocol (STP) is a network protocol that builds a loop -free logical topology for Ethernet networks. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them. Spanning tree also allows a network design to include backup links to provide fault tolerance if an active link fails." •Turn it off! At least check it isn’t turned on. •Unless – You know what you are doing and designed the network with a schema in mind. – You don’t have segregated traffic on your network (?QoS?). – You are implementing a per VLAN spanning tree protocol (MTSP or similar) AIMS IP Showcase IBC 2019 September 2019 Curated by Video Services Forum vsf.tv 9 I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Multicast If you’re an operator make sure you know when to use multicast flows. Think about the old -fashioned analogue parallel IGMP Snooping Means that only devices that want to listen to multicast traffic need to Make sure you configure this to conserve bandwidth on your backplane, particularly if you’re in a situation where you’re likely to use a lot of multicast flows (splitting large live feeds to recorders and transmission / live mix? 2110 Running Dante AES67 mode?) You may need to disable on specific ports if you need wi -fi access for control! I P S H O W C A S E T H E AT R E AT I B C 2 0 1 9 : 1 3 –1 7 S E P T 2 0 1 9 Thank you Thank you to our Media Partners Matt Ward, Jigsaw24 matt.ward@jigsaw24.com , +44 (0) 7824 691 687 18