Tutorials and Topics - Peabody Computer Music

Audio I/OAudio input andoutput with MSPFor example, after the Max/MSP ReWire Device is registered, Cubase SX 1.0 will have aMax/ MSP menu item in the Devices menu. When you choose it you will see a list of theaudio outputs from Max/MSP. They will default to the off state. Click on any of thebuttons to activate that channel. Once the channel is activated it will show up in theCubase Track Mixer.MSP can also be used as a Mixer Application for ReWire Devices such as Reason. To dothis, you use the rewire~ object. Please see the MSP Reference Manual pages on the rewire~object for more information.If you try to use rewire~and the ad_rewire audio driver simultaneously, you won't get anyaudio output. This is because each is waiting for the other: the ad_rewire driver is waitingfor the rewire~ object to ask it for an audio stream, but the rewire~ object can't doanything unless given processing time by an audio driver.However, you can use rewire~ in conjunction with the Max Runtime or a standalone builtusing Max/MSP when the runtime or standalone is using the ad_rewire driver.Inter-application Synchronization and MIDI in ReWireReWire supports sending synchronization, transport, and tempo information both to andfrom ReWire Devices. The hostsync~, hostphasor~, and hostcontrol~ MSP objects can workwith the ad_rewire driver to provide this information and to control the host’s transport.See the MSP Reference Manual pages of these objects for more information.Rewire 2 also supports MIDI communication to and from ReWire Devices. Currentlyboth the rewire~ object and the ad_rewire driver support MIDI, although they work indifferent ways. To send and receive midi using the rewire~ object, you send message toand receive messages directly from the object. See the MSP Reference Manual pages forthe rewire~ object for more information.The ad_rewire MIDI support is more integrated into the Max MIDI system—Max MIDIports are created so you can use the standard Max MIDI objects to send and receive MIDIvia the ad_rewire driver. After you choose the ad_rewire driver in the DSP StatusWindow, MIDI ports will appear in the MIDI Setup window the next time it is opened.The number of midi ports dedicated to ReWire can be changed using the MIDI Portsoption in the DSP Status Window.For example, you can choose one of the Max ReWire MIDI ports as a MIDI output devicein Cubase and then use standard Max MIDI objects (such as notein) to control yourMax/MSP created synthesizer. Likewise, you can send MIDI into Cubase using the maxMIDI objects and the ReWire MIDI ports, and recorded the results to a track for furthermanipulation or playback.52