[PD] chronometer + metronome that syncs multiple Android/iOS devices over network?

enrike altern2 at gmail.com
Wed Mar 6 22:17:33 CET 2019

I already have a test version running! nice. I used PDdroidparty and I 
get a phone and two computers running the same chronometer in sync. 
there are some issues I need to check yet but it seems this like this is 
the right direction to go. I will dump the code into github when it is 

(I am fighting now with PdDroidPublisher as we would need to have an apk 
that we can just install into participants mobiles. The PdDroidPublisher 
documentation is outdated as far as I can see and I far from being an 
expert in Android Studio configuration, lets see)


19/3/6 04:13(e)an, Chris McCormick igorleak idatzi zuen:
> Hello Enrike,
> On 6/3/19 12:18 am, enrike wrote:
>> We need a chronometer that runs in sync in multiple devices at the 
>> same time.
> SyncJams might work for you:
> https://github.com/chr15m/SyncJams
> The algorithm it uses is tolerant of adverse network conditions. All 
> devices run their own internal clock and the clocks converge on a 
> consensus "current tick".
> The algorithm is very simple: every device broadcasts its current tick 
> over the network. If a device receives a tick which is higher & earlier 
> than it expected it immediately resets its own clock to that new timing.
> What this means in practice is the smallest (i.e. best) point-to-point 
> ping time between any two participating patches is the closest that the 
> clocks will get in sync. On a WiFi LAN this is generally on the order of 
> 1 to 3 milliseconds which is close enough for most musical applications. 
> In my experience devices converge on that value quite quickly after 
> joining the network.
> Here's a video of Chris Rice aggressively changing the BPM from which 
> the devices manage to recover after a second or two:
> https://www.youtube.com/watch?v=yNvD-KQhR9k
> Here are two Android devices syncing:
> https://www.youtube.com/watch?v=Z5tlEZwttBM
> I've been planning to revisit the project to simplify it and port to 
> Supercollider etc. for some time but who knows if I'll ever get around 
> to that.
> Cheers,
> Chris.

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