Apple Logic Pro 7 - Manual (Page 343)

Chapter 8 Global Tracks 343
• The third way to generate a chord symbol is when a transposition event is created or
altered in the Transposition track. In this scenario, the root note will be shifted
accordingly. This behavior is due to the close links between the Chord and
Transposition tracks.
Global Transposition Generated by the Chord Track
Any chord in the Chord track can affect global transposition, thus altering the playback
key of Apple Loops and MIDI Regions. MIDI Regions will only be transposed if the No
Transpose checkbox is inactive in the respective Object Parameter boxes. The
transposition interval is derived from the gap between the chord root and the root of
the first key signature in the Signature track. If a chord is created, this will immediately
be reflected in the Transposition track.
You might come across situations where there are incorrect or missing chords in the
Chord track. As an example: you record a MIDI Region, select it and use the Chord
track’s Analyze button. Normally this should work fine, as the Analysis algorithm is
rather intelligent and knows all about harmonics. If the result of the Analysis process
unexpectedly doesn’t comply with your recording, Logic provides you with an easy
solution: The Chord track’s Change Display Only mode. If you activate this mode by
clicking the Change Display Only option in the Chord track, you will be able to adjust
the chords to match what you’re actually hearing (the transposition events in the
Transposition track are adapted accordingly). All changes applied to chords in the
Chord track while the Change Display Only mode is active, will have no result on the
playback of the corresponding MIDI Regions—these changes will only adapt the
chords displayed in the Chord track to match the chords played in the MIDI Region.
Note: The Change Display Only mode is automatically activated while performing a
chord analysis of MIDI Regions.
The Change Display Only mode does not work with Apple Loops used on Audio tracks.
This should be no problem, as you normally will not need this function when working
with Apple Loops. There is one exception, however: some Apple Loops contain chord
progressions. These chord progressions are not displayed in the Chord track.
Unfortunately, you can’t use the Chord track’s Change Display Only mode to match the
displayed chords to what is heard. All changes in the Chord track will affect the
transposition of the Apple Audio Loops. Activating the Change Display Only option
doesn’t help.
However, there is a workaround:
1 Simply cut the Apple Audio Loop exactly at the position of the chord changes.
2 Match the chords displayed in the Chord track with the chord progression in the cut
Apple Loop files by entering the chords of each section manually in the Chord track.
The individual Apple Loop parts are transposed accordingly.