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

aes67.app

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

#11
post #7
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Earlier quoted context omitted.

a protocol for audio over IP

This is LAN audio streaming right? Like the kind of thing you'd use at a venue. Not internet radio.

Yes, AES67 (like Dante) is geared towards low latency over reliable links. Tipically wired ethernet.

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

#12
post #7
post #4

Earlier quoted context omitted.

a protocol for audio over IP

This is LAN audio streaming right? Like the kind of thing you'd use at a venue. Not internet radio.

Yeah if you want real security use AES256 instead ...

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

#13
post #6
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Very nice! Can you link some resources regarding how to implement AES67? What kind of latencies are you able to achieve?

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/

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...

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

#14
This is very cool. I am curious if the maintainers could sync up with the folks that wrote Ampache [1] so people could use the two of them together, for those that stream their catalog locally using aes67.

[1] - https://github.com/ampache/ampache

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

#15
post #12
post #7

Earlier quoted context omitted.

This is LAN audio streaming right? Like the kind of thing you'd use at a venue. Not internet radio.

Yeah if you want real security use AES256 instead ...

No, that's not for security, that's for multi-channel 3.1 (256/67=3.x). So you can stream a L+C+R+LFE. More bass for your face with that sub.

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

#18
post #9
post #6

Earlier quoted context omitted.

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/

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.

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.

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

#19
post #18
post #9

Earlier quoted context omitted.

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.

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.

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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