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

[Antoine Rousseau]

Hi Enrike,

you'll probably find that syncing many devices together (especially via a
wifi network) is a rather difficult task.
Many parameters can make it complicated, above all network latency and
device latency. Network latency is often quite variable and unpredictable,
and the same goes for audio latency on Android.

That said, it seems that the best solution currently is Ableton Link (
https://www.ableton.com/en/link/), which is a GPL cross-platform library
and protocol.
It is implemented to Pd through the [abl_link~] object (available from
Deken for most platforms).

In some case where [abl_link~] wouldn't work (I had crashes on a
raspberryPi), you can use Carabiner which provides a network socket to Link:
https://github.com/Deep-Symmetry/carabiner

good luck!


Le mar. 5 mars 2019 à 17:18, enrike <altern2 at gmail.com> a écrit :

> hi all
>
> We need a chronometer that runs in sync in multiple devices at the same
> time. Target platform is android, and if possible iOS as well. We are
> thinking also that it would be great to have some sort of metronome
> running together with the chronometer (we have trained musicians
> together with non trained musicians in the ensemble).
>
> So far we have been using http://chronograph.io/ so far but it is not
> 100% reliable, we had a few issues last performance (one device was ~1
> sec behind the others, and often during rehearsals we had problems with
> the start signal not being sent at all).
>
> I am considering the possibility of implementing this functionality in
> PD using PDdroidparty and OSC. Because we dont like the tools we have
> found online. We found some nice metronomes but the only one that seems
> to sync is only iOS. And we do need the chronometer (in fact priority n1
> is the chronometer right now). I thought maybe someone can point into
> some existing alternative before I try to reinvent the wheel.
>
> One of the biggest issues I foresee is to find an easy and quick way for
> the master device to find out the available slaves in the network. I
> would not like to have to, one by one, find and then type the IPs of
> each single device in the master device, although the master could be a
> laptop running PD and that would make it easier to type them...
>
> thanks in advance for any feedback
>
> enrike
>
>
>
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