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9Utility Functions
ABC Zone —————————————————————————————m
Turns ABC On or OFF.
m
Graphic range markers
(arrows appear if the
markers are moved out-
side the screen area).
m
m
Lowest note in
ABC range. Highest note in
ABC range.
This utility function sets the range of notes
in which chords played will be recognized by
the QY20 ABC system (see “10: The QY20
As a Tone Generator/ABC Expander”, page
170).
Use then “ABC” parameter to turn the
QY20 ABC system “On” or “Off” as required.
The “Low” and “High” parameters at the
bottom of the display set the ABC range. The
maximum range is from C-2 to G8 (the
“High” parameter cannot be set lower than the
“Low” parameter). When ABC is turned
“On”, chords played within the specified ABC range will be recognized by the
ABC system and the accompaniment chord will change accordingly during song
playback or chord-track recording. To ensure reliable chord detection and recog-
nition use an external MIDI keyboard to play the ABC system. The built-in mi-
cro-keyboard can be used, but because of its small size and necessarily simpli-
fied construction, chord detection is less reliable. Notes played below the low
limit are interpreted as “on bass” notes. A chart of the chords recognized by the
QY20 is provided in the Appendix (page 179).
DETAIL
When ABC is ON, notes played below the specified high limit are not played, or re-
corded in the realtime or step record modes.