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
useable.
(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documentation is outdated as far as I can see and I far from being an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)
enrike
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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