Show HN: AES67 Stream Monitor – An app to monitor audio over IP streams

Re:Show HN: AES67 Stream Monitor – An app to monitor audio o... by rectang on Sunday June 20, 2021 @11:02AM (#27570704)

FWIW, there's a resources page with a number of links that match your inquiry: https://aes67.app/resources

Unfortunately the standard itself you have to buy. It's 50 USD for non-AES-members.

https://www.aes.org/publications/standards/

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Re:Show HN: AES67 Stream Monitor – An app to monitor audio o... by phlhar on Sunday June 20, 2021 @11:24AM (#27570916)

A draft of the standard that is as far as I know pretty much complete can be found online on the AES website: https://www.aes.org/standards/comments/drafts/aes67-r-171107...

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Re:Show HN: AES67 Stream Monitor – An app to monitor audio o... by frabert on Sunday June 20, 2021 @11:13AM (#27570802)

Yes, that's the reason I was asking :( A number of projects implement it, but I'm not an AES member and didn't feel like spending the 50USD for the official specs. I was hoping someone had made a writeup of the overall protocol.

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Re:Show HN: AES67 Stream Monitor – An app to monitor audio o... by kierank on Sunday June 20, 2021 @02:11PM (#27572489)

RTP PCM packets timed to a Precision Time Protocol clock.

As most (all?) PC audio devices don't support clock drifting the audio clock to the PTP clock, this application will either resample fractionally or click now and then. So not AES67 in the true sense.

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Re:Show HN: AES67 Stream Monitor – An app to monitor audio o... by frabert on Sunday June 20, 2021 @02:19PM (#27572553)

Ahh that answers one of the questions I had when I was thinking about implementing something like this myself, in that none of the audio APIs I know of (WASAPI and ASIO) would give you any chance of syncing your clock with external sources, thus leaving you at the mercy of clicks. Thanks for clearing that up!

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