GEM PK5 Owner's Manual page 62

By holding down the HARMONY button for about 2 seconds, the display shows the currently selected Har-
mony Type.
With the PAGE buttons, you can select the Harmony type that best suits the kind of music that you are playing.
The types of Harmony available are divided into two categories, according to whether the Harmony depends on
the notes played with the left hand or not.
Harmony types that depend on the notes played below the split point:
Closed : The notes played on the left hand are added to the melody note exactly as played. The
harmonising chord is a closed (or tight) position (notes fall within the same octave).
Open 1 : same as close but with an open chord (notes spread over 2 octaves).
Open 2 : similar to Open 1 but with the notes played on the left hand randomly assigned to the right.
Block : transforms the melody note into a full four or five note chord, each note in perfect harmony.
Harmony types that are independent of the notes played below the split point:
Octave 1 : doubles the note of the right hand by playing an octave higher. No left hand chord
required.
Oscar : doubles the note of the right hand with a note two octaves below. No left hand chord
required. This structure is based on the harmony typically used by the jazz musician Oscar
Peterson.
Jazz : adds two notes above the note played by the right hand, at intervals of a fourth and a minor
seventh. No left hand chord required.
Rock : creates a three note chord consisting of the melody note, a fifth interval and an octave
interval (e.g. C-G-C'). No left hand chord required.
Sustain
This is a general control which activates the sustain effect on all three Real Time keyboard sections, independ-
ent of the Damper pedal.
If you want to sustain the Sounds of the UPPER 1, UPPER 2 and LOWER sections, activate this function.
Reverb
PK7/PK5 has two internal multi-effect signal processors which affect the sections independently.
The first is the REVERB processor, which is activated by the corresponding button.
Pressing the REVERB button turns the corresponding display indicator on or off, activating/deactivating the
relative processor.
By holding the button pressed for about 2 seconds, the display shows the currently selected Reverb type in
large letters, which you can change with the Page buttons.
Each effect selected also displays its associated general volume level.
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