Music Creator projects contain a lot more information than the notes and digital audio files that are at the heart of your work. Controllers, RPNs, and NRPNs (xRPNs, for short) are special types of events used by MIDI software and hardware to control the details of how MIDI music is played. Automation data are used to adjust volume, pan, and other parameters of MIDI and audio tracks on the fly while playback is in progress.Editing data in the Track view’s Clips pane or the Piano Roll view gives you great flexibility. You can examine the controllers in graphical form and edit them even while recording or playback is in progress. This means you can loop over a portion of your project and hear any change you make on the next loop.For more information about automation, see Automation and Mixing. For more information about the Event List view, see The Event List view.Controllers are the MIDI events such as volume, sustain pedal, and pan that you use to change the sound while you're playing. You can enter controller data from within Music Creator, or record them from external devices such as MIDI keyboards.Controllers let you control the detail and character of your music. Say you’re playing a guitar sound on your synthesizer, but it sounds lifeless and dull. That’s partly because a guitar player doesn’t just play notes one after another—he often bends or slides on the strings to put emotion into his playing. You can use controllers in the same way, creating bends, volume swells, and other effects that make sounds more realistic and more fun to listen to.Your computer can work the controllers on your electronic instrument by sending MIDI Controller messages. The MIDI specification allows for 128 different types of controllers, many of which are used for standard purposes. For example, controller 7 is normally used for volume events, and controller 10 is normally used for pan. Every controller can take on a value ranging from 0 to 127.The Piano Roll contains several drop-down lists that let you choose the controller you want to see and edit. The contents of these lists depend on the output and channel settings and on the instrument assigned to that output and channel. Different instruments use controllers in different ways. See Instrument definitions.RPNs (Registered Parameter Numbers) and NRPNs (Non-Registered Parameter Numbers) are similar to controllers, except that both the parameter number and data value can be any number between 0 and 16,383.When RPNs and NRPNs are transmitted via MIDI or stored in a standard MIDI file, they are converted into four separate controller messages. Music Creator detects incoming xRPN messages from MIDI inputs or files and reassembles them into a single RPN or NRPN event. This provides the convenience of single RPN or NRPN events in Music Creator plus compatibility with existing files, equipment, and software. The following table shows the controller numbers Music Creator uses for RPN and NRPN events.
The Track and Console views allow you to record automation data that define changes in volume, pan and many other parameters throughout a project.The Track view allows you to create envelopes to adjust several parameters. For more about automation, see Automation.Music Creator lets you display and edit several other types of data the same way you do controller data. These data include:Remember that note velocity is an attribute of each note and not a completely separate event. You cannot add or remove velocity events in the Notes pane, but you can use the draw tool to adjust the velocity values for existing notes. You can edit individual note velocities in the Note Properties dialog box, described in Changing note properties.
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