Create Rhythm Tracks for NWC

Rhythm Tracks for NWCWe have created a new web application that can be used to create rhythm tracks for use in NoteWorthy Composer. This application utilizes the features introduced by the working draft of the Web MIDI API. At the time of this writing (May 2014), the MIDI features are only available in the latest version of the Google Chrome browser, and require some manual tweaking to get things fully enabled in the browser. Once your browser MIDI setup is working, you can use the new app to create new rhythm patterns, export them to NoteWorthy Composer, and share them with others via a simple web link.

Enabling MIDI in Google Chrome

Before you can start using the Rhythm Tracks for NWC app, you have to enable MIDI support in a Google Chrome browser. Given the developmental state of Chrome’s MIDI support, we recommend that you install and use the Chrome portable app with any web MIDI apps. This will also make it easier to diagnose problems when using the MIDI functions found in Chrome.

By default, the Web MIDI capabilities built into Chrome are disabled. They have to be manually enabled from the chrome://flags panel. The easiest way to enable Web MIDI is by copying and pasting the following link into Chrome’s address bar:


Click the enable link, then completely shutdown and restart Chrome. If you are using the full desktop install of Google Chrome, then you might have have to restart your computer before the process of fully enabling MIDI can be completed successfully.

Starting the Rhythm Tracks App

Once MIDI has been enabled in Chrome, the Rhythm Tracks for NWC app can be started from the following link:

The app starts by showing the current settings for trigger resolution, beats per bar, number of bars, tempo, drum style, and drum kit. Any settings that have not been coded into the app’s URL can be changed before powering the app. If a setting is disabled (cannot be changed), then it has been coded into the link/URL used to open the app. The above link does not hard code any of the app’s settings, so they all can be configured in this opening panel.

Once you have set all of the options as needed, the Power On button will actually start the MIDI app, open all of your computer’s MIDI devices, and initialize its browser interface. If you get an error after powering the app, then MIDI is probably not yet enabled correctly in your browser. Review the previous section for more details.

Crafting a Drum Pattern

Basic Rhythm TrackOnce the app has been powered, you will see your list of drum names with a series of triggers on the right. Each trigger can be enabled with a mouse click. Some actions of note that are supported in the app include:

  • The spacebar can be used to start and stop playback of the drum loop. The triggers can continue to be edited while the loop is playing.
  • Right clicking on a drum name provides a special menu where the drum’s current bar triggers can be copied and pasted into another drum. If the pattern has multiple bars, then the drum’s current bar can also be propagated to all other bars from this menu.
  • The pattern can be exported to NWC at any time using the blue export tool button, which is located next to the play button on the toolbar.
  • The top right drop down menu includes several other useful commands, including a Virtual Launchpad (which mirrors a real Novation Launchpad Mini, if you have one), a Player Options panel (where tempo can be changed), and Share command where you can retrieve a link that represents your drum loop and can be used to reconstruct it later, or share it with others.

Using the Launchpad Overlay

Launchpad MiniIf you happen to have a Novation Launchpad, the app should automatically detect it and enable it for accessing the drum patterns. The top right button can be used to start and stop play back. The interior square buttons are overlayed with the drum triggers found on the computer screen’s drum list. The remainder of the top and right side perimeter buttons will move the overlay window view through the drum triggers. The top buttons move the overlay to later triggers in the bar, and the right side buttons move the overlay down to lower drums.