Re: [LAD] help with RtMidi and gtkmm

Hi Alessandro! You'll need to learn a bit about threading in C++, either Mutexs or Lock Free Ringbuffers. I'll advise Ringbuffers because it scales up, while mutexs is slightly easier to learn, but you'll want to learn ringbuffers soon thereafter anyway! One option is to use the Gtk::timeout functions to update the values regardless of if they've changed: bit of a hack but it works :) http://developer.gnome.org/gtkmm-tutorial/3.0/sec-timeouts.html.en Another option is to attach a "idle" function when a MIDI message is recieved in the MIDI IN callback: which tells the UI to update. Problem with both of these options: you need to tell the parameters what value to update to: this involves either mutexs or a ringbuffer. I've not looked at your code, this is all just C++ threading theory RE RtMidi & Gtkmm. Same applies for JACK & Gtkmm, or any "callback" api, and a "blocking" api like Gtkmm. Good luck! -Harry PS: I've written a blog post on Gtkmm & signal handling: http://harryhaaren.blogspot.com/2009/12/tut-5-callbacks-with-gtkmm.html Its *not* thread safe, but it explains callbacks a little.. On Sat, Feb 4, 2012 at 5:57 PM, alessandro filippo < alessandro.filippo(a)infinito.it&gt; wrote: