soco-cli
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avantrec
Adjust line-in delay
The sonos app can adjust the line-in delay, can this be added to the cli?
Just to check: are you sure you're not looking for TV audio delay adjustment (for lip-sync)?
If so, there's the existing tv_audio_delay action for that.
Yeah I saw that, that does stuff for soundbars. I am trying to get rid of the line-in delay on my Play:5 Gen 1.
OK.
Note that you can't get rid of the Line In delay completely; it's a minimum of 75ms even when a device is playing from its own Line In. There's no way around this.
I can take a look at adding the available options to SoCo-CLI. It'll need to be added to SoCo first.
75ms would be awesome! I am currently on 2s, and the speaker won't connect to the app any more to change it (I don't know why). I can control it via this tool, however.
Don't expect rapid progress on this. The Sonos API call for managing this setting isn't found anywhere obvious (I've looked), so some investigation will be required to figure out how to access it.
A month has passed, anything I can do to speed this up? :)
Not really, unless you have a way of tapping into the protocol exchange between the Sonos app. and the speaker when this function is invoked from the app.
Unfortunately, due to reasons unknown to me, my speaker won't work with the app any more... Guess I'll just have to wait, thanks
Using rvictl from Xcode on macOS, I managed to enable WireShark to snoop on the packets sent between the Sonos App on my iPhone and a Sonos speaker when changing the Line In Audio Delay.
See https://medium.com/geekculture/capture-iphone-ios-http-traffic-using-wireshark-4af01a4313e6 for details of the approach.
Unfortunately, the Line In Delay setting uses an encrypted message exchange -- HTTPS (I assume) over port 1443 on the Sonos device -- so we don't currently have a way of controlling this via SoCo. The screenshot shows the network traffic for two operations to change the delay.
Hence I'm going to close this issue. Apologies that we're not presently able to support this.
Thanks @pwt for trying! That's really unfortunate - if you ever come across a method to adjust the delay, please let me know.