Per-address priority (0xdd) packet rate from ETC products
Introduction
Most ETC products that output sACN are capable of sending per-address priority packets (0xdd). The reason for doing so, and how it's leveraged, is outlined in Difference between sACN per-address and per-port priority. This article outlines the rate at which priority packets are sent alongside level packets (0x00) for various products.
Priority Packet Rates
Important notes:
- Despite noting specific software versions these rates were tested under, generally speaking a product will behave the same across various software versions.
- Observe that some products do not send 0xdd packets by default, and with others the sending of 0xdd packets cannot be disabled.
- All packet rates were observed with static unchanging levels at the source. Unless otherwise indicated in bold text, products variably change the transmission rate of 0xdd packets based on the quantity of level (0x00) packets being sent, also known as frames per second (FPS). For example, as Eos fades between cues, it may only transmit (1) 0xdd packet for every (20-30) 0x00 packets.
| Product | Version Tested | 0xdd Sent by Default | Can 0xdd be disabled | Can 0xdd value be changed? | 0xdd Packet Rate for static levels |
|---|---|---|---|---|---|
| Cobalt | v8.3.2 | Yes | No | No, the per-address value always matches the per-universe value | (1) 0xdd for every (1-2) 0x00 packets |
| ColorSource AV | v3.4.0 | Yes | No | No, the per-address value always matches the per-universe value | (1) 0xdd for every (12-16) 0x00 packets |
| EchoTouch | v3.4.0 | Yes | No | No, the per-address value always matches the per-universe value | (1) 0xdd for every (12-16) 0x00 packets |
| Eos | v3.3.2 | Yes | Yes in v3.2.0+ | Yes in v3.2.0+, statically assigned or dynamically changed on a per-fixture basis | (1) 0xdd for every (~5) 0x00 packets |
| Mosaic | v2.16.2 | No | Yes, by setting all 'Channel priority' properties to the universe value | Yes, statically assigned on a per-channel basis | (1) 0xdd for every (1) 0x00 |
| Net3 DMX/RDM Gateway Response Mk1 Gateway |
v7.1.0 | Yes | Yes | Yes, statically assigned on a per-channel basis | (1) 0xdd for every (1) 0x00 |
| Paradigm Architectural Control Processor Mk1 and Mk2 | v4.2.4 - Current | Yes | Yes | Yes, can be statically assigned or dynamically changed on a per-address basis | (1) 0xdd for every (1) 0x00 |
| Response Mk2 Gateway | v2.2.0 (CPU1) v3.2.0 (CPU2) |
Yes | Yes | Yes, statically assigned on a per-channel basis | (1) 0xdd for every (1-2) 0x00 packets |