AlphaTrack™ Native Mode MIDI Interface Description
Revision: 1.0
Date: 12/21/2006
Revision History
1.0 061221 CH Releasing it as v1.0.
0.93 061220 BB Changed polarity of footswitch (now 7F == “Down”)
0.92 061116 CH Changed graphic of unit to represent the final button layout.
0.91 061115 CH Changed In and Out buttons to TrackL and TrackR. Updated the local operations section.
0.9 060907 CH Changed all name references to AlphaTrack.
0.8 060525 CH Added 5
th
LCD mode button, and renamed several buttons. Eliminated provision for
custom characters.
0.7 060304 CH Major changes for new layout and features.
0.6 051230 CH Added FLIP LED message and LCD “control” sysex message.
0.5 051212 CH Added sysex message to write custom characters.
0.4 051209 CH Took out “Go to Native Mode” message, and updated Device Inquiry response. Also
filled out the “local” actions somewhat.
0.3 051202 CH Changed touch strip movement to be like the fader
0.2 051202 CH Changed touch strip movement to be like the data wheel encoder
0.1 051101 CH Original
Introduction
This document describes how to gain access to the AlphaTrack’s controls and display elements
using Native mode MIDI messages. It is useful to software developer’s, but most users do not
need to refer to it. The Frontier Design Group’s AlphaTrack provides “channel strip” and global
controls for PC- and Mac-based Digital Audio Workstation (DAW) software. The AlphaTrack
consists of a compact unit that plugs into a USB port of either a Mac- or Windows-based PC. For
DAW software packages that allow for the creation of custom control surface plug-ins, the driver
provides what we refer to as “Native” mode. For other DAW software packages, the AlphaTrack
USB driver provides HUI emulation. The AlphaTrack driver applet allows the user to select
which mode (Native or HUI emulation) the driver operates in. AlphaTrack presents itself as a
MIDI input/output device, and the driver converts all inputs (buttons, encoder, and fader) and all
outputs (LED’s and LCD) on the unit to common MIDI messages.
Fig. 1: AlphaTrack Unit
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