Hi Aaron, Thanks for your clear and definitive information - very helpful indeed. My app doesn’t do realtime audio per se, just control functions and firmware updates. It was originally written for a music-related product, but this time it’s been adapted for an industrial system that has nothing to do with music, and it will never be on the App Store. I stayed with MIDI because I already had the framework, and because both Mac and Windows have class-compliant USB MIDI drivers, so I don’t have to worry about drivers.
So Helper App, here I come! I can see that debugging will be challenging unless I buy another Xojo license :/ Thanks, Julia Date: Thu, 28 Dec 2017 20:14:35 +0100 From: Aaron Andrew Hunt <aaronandrewh...@zentral.zone<mailto:aaronandrewh...@zentral.zone>> Subject: Re: [MBS] Main Thread UI Blocking MIDI Plugins Hi Julia. This problem is due to Xojo's “cooperative threading model”. They’ve said on the forums that they aren’t going to change it, so we’re stuck with it. So the only way around this problem using Xojo is to handle MIDI input in a helper MIDI app which communicates with a GUI app using sockets. I’ve done it and it works. Unfortunately working this way brings in a host of other problems. It taxes the processor more heavily, and is a nightmare for debugging. The apps have to keep tabs on each other to handle exceptions. Also keep in mind that such “multi-apps” won’t work on the Mac App Store. Apple has something called XPC-Services which are supposed to allow one to do this same kind of thing within one app, and MBS has some functions for it, but despite my efforts I never got them to do anything, so I gave up on it. I need things to be cross-platform anyway, so using an Apple-only solution is not good enough. Conclusion: realtime audio is doable using a multiple app model, but it’s far from ideal. Until Xojo drops its “cooperative threading model”, it will remain a poor choice for making realtime audio apps. I say that with regret, because I’ve used Xojo forever and otherwise I love it. Cheers, Aaron _______________________________________________ Mbsplugins_monkeybreadsoftware.info mailing list mbsplugins@monkeybreadsoftware.info https://ml01.ispgateway.de/mailman/listinfo/mbsplugins_monkeybreadsoftware.info
