Yamaha RY8 Owner's Manual page 73

TURNING THE EXTERNAL IN START FUNCTION ON AND OFF - When the
External In Start function is turned on, the pattern or song playback will begin
automatically with the first note you play on the guitar. Hold [MODE] and
press [PAGE+] once or more to access the Start function. The word "START"
will appear in the lower left area of the LCD, along with the current Start
function status—"ON" or "OFF". Press [+1] to turn the Start function on.
[-1] to turn it off. (To stop the playback, press [STOP].)
USING THE RY8 AS A GUITAR TUNER
The RY8 has a built-in guitar tuner which is extremely easy to use. Simply
plug a guitar into the [EXT IN] jack, turn up the volume, access the External
In Mode Tuner function, and play a string. The RY8 will sense the pitch of
the string you play, and will display the pitch in the upper left area of the
screen. It will also sense if the pitch is sharp or flat, and will indicate this by
small black squares that appear on a horizontal "scale" in the upper right
area of the screen.
USING THE GUITAR TUNER - Hold [MODE] and press [PAGE+] or [PAGE-]
to access the Tuner function. Then, play an open string on the guitar and
begin tuning the string.
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