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I am getting an iPad and my mate has an iPad as well. We have a bit of a band and want to know if it's possible to 'sync' 2 iPads together to use music making apps that will play at the same tempo and be on beat with each other?

Is there some way to do this or something we need to do? How can we achieve true syncing of 2 iPads for music app usage?

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Your question reminded me of Torchbox's video 'A Starry Night', which has synchronised images. Unfortunately I haven't been able to find any info about how they made it. –  Clare Macrae Nov 19 '11 at 10:53

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Yes, it is possible, and great fun!

One way to synchronize apps is using Korg's WiST technology. This allows apps on multiple iDevices to synchronize over WiFi. They maintain a list of compatible apps on their site.

Another method is to slave all of your iDevices to a single MIDI clock (e.g. a drum machine that sends clock over MIDI). There are multiple ways to get MIDI into your device including the Alesis IO Dock, the iRig MIDI, and the Line6 MIDI Mobilizer. This is a little more hassle than the WiST approach because you have to wire up a bunch of cables, but it opens up a larger group of apps since there are many apps that support CoreMIDI that do not support WiST. When shopping for apps in the App Store, look for any that say they support CoreMIDI. This page has a good starting list, but is by no means comprehensive.

Finally, in addition to this multiple-iPad fun, you can also make use of MIDI between apps on a single iPad. e.g. Running a sequencer that is controlling a synth app running in the background. Not all CoreMIDI apps support it, but many do. I've been having a great time using the Genome sequencer app to control synths such as Animoog.

It's a great time to be a musician and have an iDevice....much is possible now that was impossible only months ago!

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p.s. Note that the "same app" part of your question is a completely unnecessary requirement. You and your friend could both run Animoog, or one could run Animoog while another uses iElectribe. Either way, it's possible to synchronize. –  Jonathan Van Matre Dec 15 '11 at 23:23

This is something that the app itself would have to have supportfor. There's no support for this inherently in the iPad or in iOS.

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Yes and no. The OS provides CoreMIDI support, but apps have to implement it in order for it to work. –  Jonathan Van Matre Dec 16 '11 at 18:29

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