Hello Alex, Many thanks for your answer. I'm currently trying RhoMobile and plan to use it as a cross platform multimedia solution (audio sequencer - animation - video editing). I know RhoMobile may not be the best solution for this purpose but I really want use ruby scripting and be cross platform. I'm also checking native options like SDL or Cordova with opal/Js. Do you think RhoMobile will be able to handle multitrack audio recording with MIDI facilities?