Yamaha AN1x Owner's Manual page 108

7. Thicken the sound with Unison play.
Press the [LAYER] switch once to select the Unison
mode. ("UNISON" appears accordingly in the right
area of the LCD.) This produces a much thicker sound
when you play, stacking up five sounds with each note.
8. Add a delay effect to the sound.
Set the [EDIT ROTARY] switch to the VOICE COMMON
menu, then press Dly/Rev EF Param [UP/DOWN] to
display "Dly Return" in the LCD. Press Data
[UP/DOWN] to set a value of about "30".
There are many other parameters you may
want to adjust to get just the right sound you
want. When you're finished with the editing
process, perform a Voice Store operation to
store your creation. For information, see page
98.
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