The following test [...]
perhaps note that each withTransport creates a new connection. so you may want to group activities under one connection. in which case IO actions can be "lifted" into the transport action. also, hosc has pauseThread, a real-valued (in seconds) threadDelay. also, that OSC message layout, with everything in the address, is a little odd? more traditional would be either (Message "/sin0/frq" [float 100]) or as below? best, rohan main = withMax $ mapM_ note (cycle [1,1,2]) withMax = withTransport (openUDP "127.0.0.1" 9000) sin0 param val = sendMessage (Message "/sin0" [string param,float val]) pause = liftIO . pauseThread . (* 0.6) note n = do sin0 "frq" 100 sin0 "amp" 1 pause n sin0 "amp" 0 pause n