# PTP

Published articles for PTP.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## AES67 audio-over-IP on the ESP32-P4

DevFeed: [AES67 audio-over-IP on the ESP32-P4](<https://devfeed.tech/articles/aes67-audio-over-ip-on-the-esp32-p4-13774.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2026/06/aes67-audio-over-ip-on-the-esp32-p4/>)

Author: John Lee

Published: 2026-06-24T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP32-P4](<https://devfeed.tech/topics/esp32-p4.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [Ethernet](<https://devfeed.tech/topics/ethernet.md>), [Latency](<https://devfeed.tech/topics/latency.md>), [RISC-V](<https://devfeed.tech/topics/riscv.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Toit](<https://devfeed.tech/topics/toit.md>), [Raspberry Pi](<https://devfeed.tech/topics/raspberry-pi.md>)

Tags: [aes67](<https://devfeed.tech/tags/aes67.md>), [audio](<https://devfeed.tech/tags/audio.md>), [blog](<https://devfeed.tech/tags/blog.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-p4](<https://devfeed.tech/tags/esp32-p4.md>), [ethernet](<https://devfeed.tech/tags/ethernet.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [ip](<https://devfeed.tech/tags/ip.md>), [latency](<https://devfeed.tech/tags/latency.md>), [low-latency](<https://devfeed.tech/tags/low-latency.md>), [network](<https://devfeed.tech/tags/network.md>), [networking](<https://devfeed.tech/tags/networking.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [ptp](<https://devfeed.tech/tags/ptp.md>), [ravenna](<https://devfeed.tech/tags/ravenna.md>), [risc-v](<https://devfeed.tech/tags/risc-v.md>), [rtp](<https://devfeed.tech/tags/rtp.md>), [sync](<https://devfeed.tech/tags/sync.md>)

### AI overview

This article describes implementing a working, PTP-synchronized AES67/RAVENNA audio endpoint on the ESP32-P4 as an ESP-IDF component. It covers clock synchronization, low-latency packet reception, and I2S playout, reporting best-case end-to-end latency of about 0.7 ms and noting which parts are solid or still limited.

### Source excerpt

AES67/RAVENNA is the audio transport behind a lot of broadcast and live-sound infrastructure, and it normally runs on dedicated silicon or Linux boxes. This article is about getting a working, PTP-synchronized AES67 endpoint onto an ESP32-P4 -- how the clock sync, the low-latency receive path, and the I2S playout fit together, what the measured latency is, and where the edges are.

## SwiNOG 40: Deploying Precision Time Protocol across WAN

DevFeed: [SwiNOG 40: Deploying Precision Time Protocol across WAN](<https://devfeed.tech/articles/swinog-40-deploying-precision-time-protocol-across-wan-11251.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/09/swinog40-ptp-wan/>)

Published: 2025-09-23T05:33:00Z

Content type: article

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [Network](<https://devfeed.tech/topics/network.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>)

Tags: [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [network](<https://devfeed.tech/tags/network.md>), [precision](<https://devfeed.tech/tags/precision.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [ptp](<https://devfeed.tech/tags/ptp.md>), [synchronization](<https://devfeed.tech/tags/synchronization.md>), [time](<https://devfeed.tech/tags/time.md>), [wide](<https://devfeed.tech/tags/wide.md>), [worth-reading](<https://devfeed.tech/tags/worth-reading.md>)

### AI overview

The article discusses deploying Precision Time Protocol across a country-wide WAN to achieve nanosecond-level synchronization between cities. It states that this requires dedicated infrastructure and points to a SwiNOG 40 presentation by Oliver Ettlin for more details.

### Source excerpt

Is it possible to deploy Precision Time Protocol across a country-wide WAN network and reach nanosecond-level synchronization between cities? It's definitely not trivial and only works over dedicated infrastructure; for more details, watch the PTP in WANs (video) presentation Oliver Ettlin had at SwiNOG 40.

## What time is it? A simple question with a complex answer. How computers synchronize time

DevFeed: [What time is it? A simple question with a complex answer. How computers synchronize time](<https://devfeed.tech/articles/what-time-is-it-a-simple-question-with-a-complex-answer-how-computers-synchronize-time-27113.md>)

Original publisher: [Read original article](<https://andrea.corbellini.name/2023/01/23/what-time-is-it/>)

Author: andreacorbellini

Published: 2023-01-23T19:15:00Z

Content type: article

Language: en

Sources: [Andrea Corbellini](<https://devfeed.tech/sources/andrea-corbellini.md>)

Topics: [DateTime](<https://devfeed.tech/topics/datetime.md>), [Network](<https://devfeed.tech/topics/network.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>)

Tags: [clocks](<https://devfeed.tech/tags/clocks.md>), [information-technology](<https://devfeed.tech/tags/information-technology.md>), [network](<https://devfeed.tech/tags/network.md>), [ntp](<https://devfeed.tech/tags/ntp.md>), [performance](<https://devfeed.tech/tags/performance.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [ptp](<https://devfeed.tech/tags/ptp.md>), [relativity](<https://devfeed.tech/tags/relativity.md>), [standard](<https://devfeed.tech/tags/standard.md>), [time](<https://devfeed.tech/tags/time.md>), [time-synchronization](<https://devfeed.tech/tags/time-synchronization.md>)

### AI overview

This article explains why accurate time synchronization matters for computers, phones, applications, and other devices. It introduces challenges in synchronizing time and examines the Network Time Protocol (NTP) and Precision Time Protocol (PTP), while also discussing concepts including time, change, causality, and the definition of a second.

### Source excerpt

Ever wondered how your computer or your phone displays the current date and time accurately? What keeps all the devices in the world (and in space) in agreement on what time it is? What makes applications that require precise timing possible? In this article, I will explain some of the challenges with time synchronization and explore two of the most popular protocols that devices ...